Meaning of CERTAIN in English
adj. 25B6; adjective
I'm certain he's guilty : SURE, confident, positive, convinced, in no doubt, satisfied, assured, persuaded.
it is certain that more changes are in the offing : UNQUESTIONABLE, sure, definite, beyond question, not in doubt, indubitable, undeniable, irrefutable, indisputable; obvious, evident, recognized, confirmed, accepted, acknowledged, undisputed, undoubted, unquestioned, as sure as eggs is eggs.
they are certain to win : SURE, very likely, bound, destined.
certain defeat : INEVITABLE, assured, destined, predestined; unavoidable, inescapable, inexorable, ineluctable.
there is no certain cure for this : RELIABLE, dependable, trustworthy, foolproof, tried and tested, effective, guaranteed, sure, unfailing, infallible; informal sure-fire; dated sovereign.
a certain sum of money : DETERMINED, definite, fixed, established, precise.
a certain lady : PARTICULAR, specific, individual, special.
to a certain extent that is true : MODERATE, modest, medium, middling; limited, small.
doubtful, possible, unlikely.
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012