certain

certain (Fixed), adjective absolute, assured, attested, certified, changeless, conclusive, confident, confirmed, decisive, definite, determinate, determined, firm, incontestable, incontrovertible, indisputable, inescapable, inevitable, infallible, irrefragable, irrefutable, official, positive, reliable, settled, stable, static, sure, unambiguous, unanswerable, unappealable, unchanging, undeniable, undisputed, unerring, unmistakable, unpreventable, unquestionable
Associated concepts: absolutely certain, capable of being rennered certain, certain powers and privileges, sum certain

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certain (Particular), adjective certus, distinct, exact, exclusive, individual, marked, peculiar, precise, singular, special, specific, specified, unique

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certain (Positive), adjective absolute, actual, assertive, assured, attested, authoritative, axiomatic, beyond a shadow of doubt, beyond all dissute, beyond all question, capable of proof, certified, certus, changeless, clear, clear-cut, clearly known, conclusive, concrete, confident, consistent, correct, credulous, decided, decisive, definite, demonstrable, demonstrated, dependable, distinct, ensured, established, evident, evidential, existing, final, fully convinced, guaranteed, inalterable, inappealable, incommutable, incontestable, incontrovertible, inconvertible, indefeasible, indestructible, indisputable, inerrant, inescapable, inevitable, inexorable, infallible, inflexible, invariable, inviolate, irreducible, irrefragable, irrefutable, irresistible, irresoluble, irreversible, irrevocable, knowing, past dispute, persuaded, questionless, real, reliable, right, satisfied, self-evident, settled, stated, sure, tangible, true to the facts, unaltered, unambiguous, unassailable, unavoidable, unchangeable, unconfuted, undeniable, undeviating, undoubted, undoubtful, undoubting, unequivocal, unerring, unfailing, unhesitating, unimpeachable, unqualified, unquestionable, unquestioned, unshakable, unsusceptible of change, unvarying, valid, veracious, verifiable, void of suspicion
Associated concepts: capable of being rendered certain

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certain (Specific), adjective appropriate, ascertained, assigned, bounded, categorical, characteristic, choice, clear-cut, clearly defined, clearly stated, definite, designated, determinate, distinct, esoteric, especial, exact, exclusive, explicit, express, expressed, fixed, individual, limited, marked, noteworthy, particular, peculiar, precise, prescribed, quidam, respective, restricted, select, settled, singular, specified, stated, well-defined

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See also: absolute, actual, authentic, axiomatic, conclusive, concrete, constant, convincing, corporeal, de facto, decisive, definite, dependable, determinative, dogmatic, explicit, express, incontestable, indubious, inescapable, inevitable, irrefutable, lucid, necessary, official, palpable, peremptory, pertinacious, positive, reliable, resounding, safe, secure, separate, several, special, specific, tangible, true, unalienable, unambiguous, unavoidable, undeniable, undisputed, unequivocal, unmistakable, unrefutable