| impromptu | (adjective) with little or no preparation or forethought | Synonyms: ad-lib, extemporaneous, extemporary, extempore, off-the-cuff, offhand, offhanded, unrehearsed |
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| parvenu | (adjective) of or characteristic of a parvenu | Synonyms: parvenue |
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| (adjective) characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position | Synonyms: nouveau-riche, parvenue, upstart |
| snafu | (adjective) snarled or stalled in complete confusion | Synonyms: fucked-up |
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| tabu | (adjective) excluded from use or mention | Synonyms: forbidden, out, prohibited, proscribed, taboo, verboten |
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| (adjective) forbidden to profane use especially in South Pacific islands | Synonyms: taboo |
| u | (adjective) (chiefly British) of or appropriate to the upper classes especially in language use | - |
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