The top engineer put the car through a series of rigorous tests.
Source: tatoeba (37880)
Rigorous
/ˈɹɪɡəɹəs/
Synonyms for "rigorous" (496 found)
Ranked by relevance and common usage.
Closest matches (100)
Adjective(30 words)
stringentacademic bacteriologistacademic communitiesacademic descriptorsacademic disciplineacademic ethosacademic frenchacademic grammaracademic influenceracademic logicianacademic techniqueacademic topicadvanced chemistry courseadvanced material curriculumadvanced mathematicsadvanced multiplication drillsadvanced textbooksaesthetic practice criteriaanalyticalanalytical framework
Show 10 more words
analytical toolkitancient history studyap physicscareful chemical manipulationscareful energy data valuescollege-level problemdeductivedifficult readingdisciplineddisciplined study
abstruseaccurateacidacidulousacridacrimoniousacuteadamantadamantineadversealgidantagonisticarcticarduousasceticastringentattentivebelow zerobitingbitter
Show 34 more words
Noun(15 words)
academic analysisacademic journalaccroidesalgorithm design methodologyariommaaspadanabrainiaccareful examinationchallenging behaviorclose friendcontrolled studycudgellingdata-modelingdeductive reasoningdesign model
Verb(1 words)
Strong matches (148)
double edgeddouble-edgeddourdraconiandrasticedgedescharoticevenexactexactingexcessiveexigentexorbitantexpressexquisiteextravagantextremefaithfulfiercefine
Show 68 more words
finicalfinickingfinickyfirmflintyformidablefreezingfreezing coldfrigidfundamentalistfuriousfussygelidglacialgreatgrimhairyhardhard corehard earnedhard foughthard-corehard-earnedhard-foughtharmfulharshherculeanhibernalhideboundhiemalhostilehyperboreanice coldice-coldice-encrustedicelikeicyilliberalimmoderateimmovableimmutableimplacableimpliablein oppositionincisiveinclementinelasticinerrableinerrantinexorableinfallibleinflexibleinimicalintemperateintenseintransigentintricateironironboundironcladironhandedirreconcilablejawbreakingkeenknottedknottylaboriousmathematical
Adjective(33 words)
draconiandutch kracht methodeducational research methodexact scienceexacterexactestexactingexcruciatingexhaustive listingexpert microbiology lessonfiercestforensic evidenceforensic fileformal algorithmformal analysisformal permissionformal specification languagehigh standardshigh-gradehonors track
Show 13 more words
intensivelogical methodlogical organizationmath-booklikemathematical definitionmathematical inquirymathematical knowledgemathematical objectmathematical patternmathematical problemmathematical proofmathematical relationshipmathematical system
Noun(27 words)
enforcement of precise ruleexpert levelformal logicianformal reasoningfull-body checkgacruxgrading standardgrillinghigh culturehonors history coursehonors physics classhonors physics programhonors physics trackilosoneinsistinglab qualityliterary criticismlofortyxmath challengemath curriculum subject
Show 7 more words
math problem-likemath termsmathematical descriptormathematical groupmathematical logicianmathematical operationmathematical term
Related words (248)
Noun(40 words)
mathematics vocabularymeasuring stickmore challenging tasksmore lab-grademore mathematicalmore systematicnauchphysical science projectphysics experiment designpiercing glarepsychometric propertyquality standardradical organizingscholarly articlescholarly paperscience domainscience fair designscience skillscientific datascientific experiment
Show 20 more words
scientific inventionscientific rationalityscientific studyscientifically rigorousscientifically soundsearchingsix sigmasoftware analysisspartanstrenuous exertionstudy qualitysubject-level adjectivesystematic evidence gatheringthoroughertighteningtrompinguniversity-style exerciseunlaxwithstandingyaltopya
Adjective(66 words)
mathematics-basedmethodological auditmeticulousorderly arrangementorganizational function analysispreciseprecise definitionprecise manipulationprecise phrasingprecise reasoningprecisestprofessional mathematicianpure mathematicsrobustscholarly climatescholarly culturescholarly disciplinescholarly literaturescholarly methodscholarly methodology
Show 46 more words
scientific adjectivescientific categoryscientific conceptscientific descriptorsscientific disciplinescientific disciplinesscientific evidencescientific groundingsscientific journalscientific methodologyscientific phenomenascientific qualityscientific questionscientific revolutionsscientific termseveresolid fillersternstiff competitionstrictstrict disciplinestricteststrong governmental oversightstrong language trainingstrong proofsurgicalsystematic analysissystematic inquirysystematic investigationsystematic lesson planssystematic motion observationssystematic observationssystematic styletechnical studytextual precisionthoroughthorough coordinatorthorough evidence gatheringthoroughestthoroughgoingtighttightertrustworthyuniversity-levelunsparingwariest
meanmeticulousmicrometrically precisemicroscopicminutemiserablemordaciousmordantmurderousmuscle boundmuscle-boundnarrownicenippingnippyno picnicnot easynumbingobdurateobstinate
Show 114 more words
onerousoperoseopposedopposingoppositeoppressiveorthodoxoutrageouspainfulparticularpenetratingpiercingpinchingpinpointpoignantpreciseprecisianisticprecisionisticprocrusteanproperpunctiliouspunctualpuristpuristicpuritanpuritanicpuritanicalrawrefinedrelentlessreligiousreligiously exactrightrigidrigoristrigoristicrock-ribbedrockboundroughruggedscathingscientificscientifically exactscrupulousscrutinizingset with thornsseveresharpsiberiansinistersleetyslushysnappyspartanspinysplittingsquarestabbingsteelysteepsternstiffstingingstone coldstone-coldstraightlacedstraitstraitlacedstrenuousstressfulstrictstridentstringentstrongstubbornsubtlesubzerosupercooledtartthornyticklishtoilsometoughtrenchanttrickytroublesometroubloustryingunaffectedunalterableunbendingunchangeableuncompromisingunconscionableundeviatingunerringunfavorableungivingunmovedunrelentinguntowardunyieldinguphillvehementvenomousviolentvirulentvitriolicwickedwinterboundwinterlikewinterywintrywretched
Adjective(5 words)
Determiner(2 words)
more honors physicsmost chemical science
Verb(1 words)
Choosing the right synonym
- Closest matches in this entry: stringent, abstruse, academic analysis, academic bacteriologist, academic communities.
- Sentence evidence is available for rigorous, so synonym choice can be checked against real usage rather than a flat word list.
- Ranking signals come from wordnet, opengloss, moby, derived_reverse, and related lexical sources.
Synonym selection checklist
- Match the part of speech before comparing meanings.
- Check whether the synonym changes intensity, formality, or emotional tone.
- Read the replacement inside the full sentence, not just beside "rigorous".
- Prefer the clearest word over the most unusual word when writing for speed or comprehension.
When not to replace "rigorous"
Keep "rigorous" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Replacement workflow
1. Preserve meaning
Choose a synonym only if it keeps the core idea of "rigorous" intact in the sentence you are editing.
2. Tune tone
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
3. Re-read context
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
Final fit check
After choosing a replacement for "rigorous", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "rigorous" or choose a simpler alternative from the closest-match group.
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
More general
3 entriesMore specific
6 entriesdraconian rulesrigorous analysisrigorous testingrigorous validationstrict enforcementzero tolerance policy
Collocations
6 entriesrigorous analysisrigorous auditrigorous methodrigorous protocolrigorous standardrigorous testing
Inflections
2 entriesmore rigorousmost rigorous
Derivations
3 entriessimilar
2 entriesSample sentences
16 total sentences available.
The thief or swindler who has gained great wealth by his delinquency has a better chance than the small thief of escaping the rigorous penalty of the law.
Source: tatoeba (425554)
Angry at Leif Ericson for stealing his thunder 500 years before, Christopher Columbus once wrote a rigorous mathematical proof that showed how Ericson had never actually been to North America. Unfortunately, the proof was too difficult for even the brightest mathematicians to understand.
Source: tatoeba (554318)
The argument is rigorous and coherent but ultimately unconvincing.
Source: tatoeba (713036)
Showing 4 of 16 available sentences.
Common questions
What are the closest synonyms for "rigorous"?
Closest matches include stringent, abstruse, academic analysis, academic bacteriologist, academic communities.
How should I check whether a synonym fits "rigorous"?
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.