ensure
I
verb
ascertain, assure, certify, check, clinch, confirm, corroborate, dismiss doubt, endorse, give security, give surety, guarantee, indemnify against loss, insure, keep from harm, keep safe, make certain, make sure, offer collateral, promise, protect, safeguard, secure, underwrite, verify, warrant
II
index
avouch (guarantee), bond (secure a debt), certify (attest), cover (guard), guarantee, preserve, protect, sponsor
Burton's Legal Thesaurus.
William C. Burton.
2006