ensure

1. subtypes:

   • doom - make certain of the failure or destruction of
   • make - assure the success of
   same as: assure, guarantee, insure, secure
   verb group: guarantee, vouch - give surety or assume responsibility
2. is a type of: verify - confirm the truth of
   subtypes:

   • proof, proofread - read for errors
   • control - verify by using a duplicate register for comparison
   • double-check - check once more to be absolutely sure
   • cross-check - check out conflicting sources; crosscheck facts, for example
   • cinch - make sure of
   • card - ask someone for identification to determine whether he or she is old enough to consume liquor
   • spot-check - pick out random samples for examination in order to ensure high quality
   • cover - maintain a check on; especially by patrolling
   same as: ascertain, assure, check, control, insure, see, see to it
   verb group:

   • check, check off, mark, mark off, tick, tick off - put a check mark on or near or next to
   • check - verify by consulting a source or authority
   • ascertain, check, determine, find out, learn, see, watch - find out, learn, or determine with certainty, usually by making an inquiry or other effort
   • control, verify - check or regulate (a scientific experiment) by conducting a parallel experiment or comparing with another standard

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