Synonyms of postulate

postulate 1 of 2

noun

ˈpäs-chə-lət 

as in assumption

something taken as being true or factual and used as a starting point for a course of action or reasoning

one of the postulates that the true agnostic rejects is the assumption that it is even possible for us to know whether God exists

Synonyms & Similar Words

• assumption
• theory
• hypothesis
• premise
• belief
• given
• hypothetical
• presupposition
• presumption
• supposition
• if
• principle
• axiom
• proposition
• assertion
• thesis
• doctrine
• conclusion
• truism
• basis
• inference
• rule
• law
• tenet
• dogma
• gospel
• precept
• declaration
• foundation
• affirmation
• deduction
• standard
• dictum
• verity
• canon
• avouchment
• ground
• ipse dixit

postulate

2 of 2

verb

ˈpäs-chə-ˌlāt 

as in to say

to take as true or as a fact without actual proof

postulates that all people are born with certain rights that can never be taken away from them

Synonyms & Similar Words

• say
• assume
• presume
• believe
• hypothesize
• suppose
• think
• conclude
• presuppose
• guess
• figure
• accept
• premise
• dream
• take for granted
• insist
• hypothecate
• imagine
• infer
• deduce
• suspect
• speculate
• surmise
• conjecture
• claim
• theorize
• declare
• credit
• swallow
• perceive
• conceive
• contend
• judge
• maintain
• assert
• affirm
• gather
• suspicion
• reckon
• allege
• aver
• take
• avow
• fancy
• preconceive
• profess
• avouch

Antonyms & Near Antonyms

• doubt
• question
• challenge
• disagree (with)
• wonder (about)
• deny
• dispute
• discredit
• controvert
• discount
• disbelieve
• reject
• distrust
• repudiate
• disavow
• refute
• disclaim
• disprove
• mistrust
• rebut
• disown
• confute
• belie

Example Sentences

Recent Examples of postulate

Noun

Euclid’s postulates for geometry; various schemes for standardizing arithmetic. — Quanta Magazine, 29 Apr. 2026

That postulate would justify racial quotas or preferences to remedy racial discrimination uncorroborated by credible evidence. — Bruce Fein, Baltimore Sun, 5 Mar. 2026

Verb

In 1905, Einstein had postulated that the speed of light is constant in a vacuum and independent of the observer’s motion. — Ameya Paleja, Interesting Engineering, 24 Apr. 2026

That has led some scientists to postulate that dark matter could be partially or wholly accounted for by primordial black holes. — Robert Lea, Space.com, 10 Apr. 2026

Podcast

Get Word of the Day delivered to your inbox!