Synonyms for

Assumption

Noun / ʌˈsʌmpʃʌn / Another word for assumption — explore alternatives below. For syllable breakdowns and pronunciation, see this word on Syllablesworld.

Definition

The act of taking something for granted or accepting it as true without proof.

Synonyms & similar words

premise presumption supposition presumptuousness premiss effrontery supposal presumption supposition guess conjecture hypothesis belief theory postulation premise surmise speculation inference deduction assurance confidence conviction trust faith acceptance persuasion

Synonyms by register

Formal

presumption supposition postulate hypothesis

Informal

guess hunch shot in the dark take it for granted

Literary

conjecture surmise

Antonyms

certainty fact knowledge proof reality truth verification

Common collocations

  • make an assumption
  • base an assumption
  • challenge an assumption
  • question an assumption
  • valid assumption
  • false assumption
  • working assumption
  • initial assumption

Word family

noun assumption
verb assume
adjective assumptive

Usage note

An assumption is something accepted as true without proof. It can sometimes carry a negative connotation of being presumptuous or unfounded.

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Example sentences

  1. I made the assumption that it would rain today, so I brought my umbrella.
  2. Without any evidence, he made an assumption about her motives.
  3. The team's assumption was that they would win the game easily.
  4. She based her assumption on what she had heard from others.
  5. We should not make an assumption until we have all the facts.

Quotes

  • Assumptions are the termites of relationships.
  • Assumptions are the mother of all screw-ups.
  • Don't make assumptions. Find the courage to ask questions and to express what you really want.

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