Synonyms for assure
verb
To guarantee
vouch for, ensure, confirm, secure; see guarantee 1.
To convince
prove, persuade, reassure; see convince.
To promise
pledge, affirm, swear; see promise 1.
To encourage
reassure, inspirit, hearten, comfort; see comfort, encourage 2.
See assure in Webster's New World Roget's A-Z Thesaurus II
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