Synonyms of suppositions

suppositions

noun

plural of supposition

1

as in hypotheses

an idea that is the starting point for making a case or conducting an investigation

my supposition is that this grape variety, which flourishes in southern France, should do equally well here, given the similar climate

Synonyms & Similar Words

• hypotheses
• theories
• assumptions
• premises
• propositions
• guesses
• suggestions
• notions
• theses
• presumptions
• inferences
• feelings
• impressions
• speculations
• presuppositions
• conjectures
• theorems
• proposals
• suspicions
• generalizations
• hunches
• guesswork
• concepts
• conceptions
• surmises
• abstractions
• constructs
• concessions
• inklings
• proffers

Antonyms & Near Antonyms

• facts
• assurances
• certainties
• knowledges

2

as in guesses

an opinion or judgment based on little or no evidence

it's pure supposition on your part that there's something illegal going on next door

Synonyms & Similar Words

• guesses
• theories
• conjectures
• hypotheses
• surmises
• hunches
• speculations
• intuitions
• beliefs
• hypotheticals
• theses
• shots in the dark
• shots
• guesswork
• faiths
• dead reckonings

3

as in assumptions

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

worthless genetic research that was based on the erroneous supposition that acquired characteristics can be passed on to offspring

Synonyms & Similar Words

• assumptions
• theories
• hypotheses
• premises
• presumptions
• beliefs
• presuppositions
• postulates
• hypotheticals
• givens
• ifs
• propositions
• axioms
• assertions
• principles
• verities
• inferences
• doctrines
• truisms
• standards
• theses
• precepts
• dogmas
• laws
• conclusions
• tenets
• rules
• gospels
• foundations
• declarations
• grounds
• canons
• affirmations
• deductions
• dicta
• bases
• avouchments
• ipse dixits

Example Sentences

Recent Examples of suppositions

Many are leaning into their own unsubstantiated suppositions, even those not backed by evidence. — Rebekah Riess, CNN Money, 22 Aug. 2026

Now Kennedy took her suppositions even further, reexamining the literature on a famous Olmec site where thousands of toad skeletons had been excavated. — Kimon De Greef, Longreads, 4 Aug. 2026

The past eight months have exposed both suppositions. — Liam Twomey, New York Times, 11 Mar. 2026

As Jackie herself once reminded John, a Kennedy has no choice but to accept that the press and public will speculate, interpret, exaggerate, and invent notions about them based on their own suppositions. — Rafaela Bassili, Vulture, 27 Feb. 2026

O'Donnell took further issue with her feeling that Hasselbeck didn't defend her against suppositions that O'Donnell was un-American for her opposition to military advances. — Joey Nolfi, Entertainment Weekly, 7 Oct. 2025

One of the big suppositions behind the big data center boom is that the most cutting edge AI models will be at least as large, if not larger, than the leading models that exist today. — Jeremy Kahn, Fortune, 3 Sep. 2025

She’s bemused by suppositions about the advantages of her family legacy, which in reality boasts a centuries-deep ledger of addiction, estrangement, and untimely death. — Holden Seidlitz, New Yorker, 5 Aug. 2025

But that premise assumes two suppositions not in evidence. — Andre Mouchard, Oc Register, 4 Aug. 2025