Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Thesaurus

insure

verb

Synonyms and Antonyms of insure

  1. to make sure, certain, or safe <took steps to insure the timely completion of the project> Synonyms assure, cinch, guarantee, guaranty, ice, ensure, secureRelated Words attest, certify, vouch, warrant, witness; pledge, promise, swearNear Antonyms enfeeble, undermine, weaken




Learn More about insure


Seen and Heard

What made you want to look up insure? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

marked by propriety and good taste

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image567572573

Which of these is a synonym of unctuous?

prompt maudlin oily angry
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ