Word Type

Adjective

Adjective

Pronoun

Proper Noun

Determiner

The word "certain" can be used as adjective, adjective, pronoun, proper noun and determiner.

Word Relationships

Opposites (Antonyms)

impossible sure uncertain uncertain unsure

Derived Terms

certain as death and taxes certain as death or taxes certain event certain person certainly certainness certainty for certain make certain noncertain nothing is certain but death and taxes of a certain of a certain age

Distinct From

uncertain unsure

Related Terms

fated intentional irrefutable

Related Terms

absolute absolute know absolutely absolutely sure actually being being confident being sure certainty confident definite definitely denied doubted doubting established existing fact feeling for sure happen indefinite indeterminate inevitable kind kind of know knowledge known known fact most most definite opinion positive predictable specifically sure sure of surety thinking true unavoidable very very sure

Similar Terms

bound careful confident convinced definite definite dependable destined destined doomed fated fated foreordained foreordained in for in for indisputable indisputable positive predestinate predestined predictable reliable reliable sure sure as shooting sure as shooting

Synonym Network

certain p sealed sure unavoidable

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.