The top engineer put the car through a series of rigorous tests.
Source: tatoeba (37880)
Rigorous
//ˈɹɪɡəɹəs//
Synonyms for "rigorous" (300 found)
Ranked by relevance and common usage.
Closest matches (60)
exactstringentabstruseaccurateacidacidulousacridacrimoniousacuteadamantadamantineadversealgidantagonisticarcticarduousasceticastringentattentivebelow zero
Show 37 more words
bitingbitterbitterly coldbleakborealbriskbrumalbrutalburdensomecast-ironcausticclosecoldcold as charitycold as deathcold as icecold as marblecomplexcondignconflictingconscientiousconstantcontrarycorrectcountercounteractivecrispcriticalcuttingdelicatedemandingdetaileddetrimentaldifficiledifficultdirectdouble edged
Strong matches (90)
double-edgeddourdraconiandrasticedgedescharoticevenexactingexcessiveexigentexorbitantexpressexquisiteextravagantextremefaithfulfiercefinefinicalfinicking
Show 62 more words
finickyfirmflintyformidablefreezingfreezing coldfrigidfundamentalistfuriousfussygelidglacialgreatgrimhairyhardhard corehard earnedhard foughthard-corehard-earnedhard-foughthardyharmfulharshherculeanhibernalhideboundhiemalhostilehyperboreanice coldice-coldice-encrustedicelikeicyilliberalimmoderateimmovableimmutableimplacableimpliablein oppositionincisiveinclementinelasticinerrableinerrantinexorableinfallibleinflexibleinimicalintemperateintenseintransigentintricateironironboundironcladironhandedirreconcilablejawbreaking
Adjective(8 words)
Related words (150)
keenknottedknottylaboriousmathematicalmeanmeticulousmicrometrically precisemicroscopicminutemiserablemordaciousmordantmurderousmuscle boundmuscle-boundnarrownicenippingnippy
Show 118 more words
no picnicnot easynumbingobdurateobstinateonerousoperoseopposedopposingoppositeoppressiveorthodoxoutrageouspainfulparticularpenetratingpiercingpinchingpinpointpoignantpreciseprecisianisticprecisionisticprocrusteanproperpunctiliouspunctualpuristpuristicpuritanpuritanicpuritanicalrawrefinedrelentlessreligiousreligiously exactrightrigidrigoristrigoristicrock-ribbedrockboundroughruggedscathingscientificscientifically exactscrupulousscrutinizingset with thornsseveresharpsiberiansinistersleetyslushysnappyspartanspinysplittingsquarestabbingsteelysteepsternstiffstingingstone coldstone-coldstraightlacedstraitstraitlacedstrenuousstressfulstrictstridentstrongstubbornsubtlesubzerosupercooledtartthornyticklishtoilsometoughtrenchanttrickytroublesometroubloustryingunaffectedunalterableunbendingunchangeableuncompromisingunconscionableundeviatingunerringunfavorableungivingunmovedunrelentinguntowardunyieldinguphillvehementvenomousviolentvirulentvitriolicwickedwinterboundwinterlikewinterywintrywretched
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
Antonyms
1 entriesSynonyms
1 entriesderived
5 entriesrelated to
8 entriessimilar
3 entriesTranslations
51 translations across 20 languages.
Bulgarian
3 entries- взискателен adj (showing, causing, or favoring rigour/rigor)
- строг adj (showing, causing, or favoring rigour/rigor)
- суров adj (severe; intense)
Catalan
2 entries- rigorós adj (showing, causing, or favoring rigour/rigor)
- rigorós adj (severe; intense)
Chinese Mandarin
3 entries- 嚴苛的 /严苛的 adj (showing, causing, or favoring rigour/rigor)
- 嚴謹的 /严谨的 adj (showing, causing, or favoring rigour/rigor)
- 嚴酷的 /严酷的 adj (severe; intense)
Danish
1 entries- intens adj (severe; intense)
Dutch
2 entries- rigoureus adj (showing, causing, or favoring rigour/rigor)
- rigoureus adj (severe; intense)
Esperanto
2 entries- rigora adj (showing, causing, or favoring rigour/rigor)
- severa adj (severe; intense)
Finnish
4 entries- ankara adj (showing, causing, or favoring rigour/rigor)
- ankara adj (severe; intense)
- perinpohjainen adj (showing, causing, or favoring rigour/rigor)
- perusteellinen adj (showing, causing, or favoring rigour/rigor)
French
2 entries- rigoureux adj (showing, causing, or favoring rigour/rigor)
- rigoureux adj (severe; intense)
Galician
2 entries- rigoroso adj (showing, causing, or favoring rigour/rigor)
- rigoroso adj (severe; intense)
German
3 entries- rau adj (severe; intense)
- rigoros adj (showing, causing, or favoring rigour/rigor)
- streng adj (showing, causing, or favoring rigour/rigor)
Latin
1 entries- rigorosus adj (showing, causing, or favoring rigour/rigor)
Malayalam
1 entries- കർക്കശ adj (showing, causing, or favoring rigour/rigor)
Norwegian Bokmål
2 entries- rigorøs adj (showing, causing, or favoring rigour/rigor)
- rigorøs adj (severe; intense)
Norwegian Nynorsk
2 entries- rigorøs adj (showing, causing, or favoring rigour/rigor)
- rigorøs adj (severe; intense)
Portuguese
2 entries- rigoroso adj (showing, causing, or favoring rigour/rigor)
- rigoroso adj (severe; intense)
Romanian
1 entries- riguros adj (showing, causing, or favoring rigour/rigor)
Russian
4 entries- скрупулёзный adj (showing, causing, or favoring rigour/rigor)
- стро́гий adj (showing, causing, or favoring rigour/rigor)
- суро́вый adj (severe; intense)
- то́чный adj (showing, causing, or favoring rigour/rigor)
Spanish
4 entries- rigoroso adj (showing, causing, or favoring rigour/rigor)
- rigoroso adj (severe; intense)
- riguroso adj (showing, causing, or favoring rigour/rigor)
- riguroso adj (severe; intense)
Turkish
4 entries- dakik adj (showing, causing, or favoring rigour/rigor)
- dikkatli adj (showing, causing, or favoring rigour/rigor)
- sert adj (severe; intense)
- sıkı adj (showing, causing, or favoring rigour/rigor)
Ukrainian
3 entries- жорсткий adj (showing, causing, or favoring rigour/rigor)
- ретельний adj (severe; intense)
- суворий adj (showing, causing, or favoring rigour/rigor)
Sample 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.
Keep exploring
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.