EN

Synonyms for assure

Most common

guarantee insure secure vouch convince tell

Definitions

  1. v. 1

    To make sure and secure; ensure.

  2. v. 2

    To give (someone) confidence in the trustworthiness of (something).

    He assured of his commitment to her happiness.

Related words

Word family
assurance

Forms

Past participle
assured
e.g. assured → guaranteed, insured, secured, vouched…

Choose the right word

Assure, State, Certify, Inform or Affirm?

To assure is to state with such authority and confidence as the speaker feels ought to make the hearer sure. Assure, certify, inform, apply to the person; affirm, etc., to the thing.

J. C. Fernald, English Synonyms and Antonyms (1914)

Example sentences

  • secure The fortress was secure from every kind of attack.
  • guarantee Tom cannot guarantee his behaviour when he drinks.
  • insure Yanni has to insure his life for his family.
  • vouch Can anyone vouch for your whereabouts last night?
  • promise You have to make good the promise for your mother.
  • encourage You often encourage me to be good and hardworking.

Popularity over time

Word1850 → 2019Trend
assurefalling
securesteady
guaranteesteady
insurefalling
vouchrising
promiserising

Use in printed books, per decade from 1850 to 2019.

By length

3 letters
see1
4 letters
tell1
5 letters
state1, check1, cheer1, vouch1, cinch1
6 letters
ensure2, secure2, assert2, insure2, solace2, avouch
7 letters
support2, control2, promise2, confirm2, warrant2, console2, satisfy3, certify3, hearten2
8 letters
convince2, persuade2, embolden3
9 letters
determine3, encourage3, guarantee3, ascertain3
10 letters
asseverate

The small number after each word is its number of syllables (ensure2 = 2 syllables).

In other languages

Français
assurer
Italiano
assicurare
Español
asegurar
Deutsch
sichern
Català
assegurar