| uptake | (noun) the process of taking food into the body through the mouth (as by eating) | Synonyms: consumption, ingestion, intake |
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| (noun) a process of taking up or using up or consuming | - |
| upthrow | (noun) (geology) a rise of land to a higher elevation (as in the process of mountain building) | Synonyms: upheaval, uplift, upthrust |
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| upthrust | (noun) (geology) a rise of land to a higher elevation (as in the process of mountain building) | Synonyms: upheaval, uplift, upthrow |
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| uptick | (noun) a transaction in the stock market at a price above the price of the preceding transaction | - |
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| uptight | (adjective) being in a tense state | Synonyms: edgy, high-strung, highly strung, jittery, jumpy, nervy, overstrung, restive |
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| uptime | (noun) a period of time when something (as a machine or factory) is functioning and available for use | - |
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| uptown | (adjective) of or located in the upper part of a town | - |
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| (noun) a residential part of town away from the central commercial district | - |
| (adverb) toward or in the upper part of town | - |
| upturn | (noun) an upward movement or trend as in business activity | - |
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| upturned | (adjective) (used of noses) turned up at the end | Synonyms: retrousse, tip-tilted |
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| (adjective) having been turned so that the bottom is no longer the bottom | Synonyms: overturned, upset |