| ascertainable | (adjective) capable of being ascertained or found out | Synonyms: discoverable |
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| ascertained | (adjective) discovered or determined by scientific observation | Synonyms: discovered, observed |
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| certain | (adjective) established beyond doubt or question; definitely known | - |
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| (adjective) having or feeling no doubt or uncertainty; confident and assured | Synonyms: sure |
| (adjective) certain to occur; destined or inevitable | Synonyms: sure |
| (adjective) established irrevocably | Synonyms: sealed |
| (adjective) exercising or taking care great enough to bring assurance | Synonyms: sure |
| (adjective) definite but not specified or identified | - |
| (adjective) reliable in operation or effect | Synonyms: sure |
| certifiable | (adjective) capable of being guaranteed or certified | - |
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| (adjective) fit to be certified as insane (and treated accordingly) | Synonyms: certified |
| certificated | (adjective) furnished with or authorized by a certificate: | - |
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| certificatory | (adjective) serving to certify or endorse authoritatively | - |
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| certified | (adjective) endorsed authoritatively as having met certain requirements | - |
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| (adjective) fit to be certified as insane (and treated accordingly) | Synonyms: certifiable |
| (adjective) holding appropriate documentation and officially on record as qualified to perform a specified function or practice a specified skill | Synonyms: qualified |
| concerted | (adjective) involving the joint activity of two or more | Synonyms: conjunct, conjunctive, cooperative, united |
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| disconcerted | (adjective) having self-possession upset; thrown into confusion | Synonyms: discombobulated |
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| disconcerting | (adjective) causing an emotional disturbance | Synonyms: upsetting |
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| incertain | (adjective) lacking or indicating lack of confidence or assurance | Synonyms: uncertain, unsure |
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| lacertilian | (adjective) of or relating to lizards | Synonyms: saurian |
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| preconcerted | (adjective) previously arranged or agreed on | - |
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| unascertainable | (adjective) not able to be ascertained; resisting discovery | Synonyms: undiscoverable |
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| uncertain | (adjective) not established beyond doubt; still undecided or unknown | - |
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| (adjective) lacking or indicating lack of confidence or assurance | Synonyms: incertain, unsure |
| (adjective) not certain to occur; not inevitable | - |
| (adjective) not established or confirmed | Synonyms: unsealed |
| (adjective) ambiguous (especially in the negative) | - |
| (adjective) not consistent or dependable | - |
| (adjective) subject to change | Synonyms: changeable, unsettled |
| uncertified | (adjective) lacking requisite official documentation or endorsement | - |
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