| altruist | (noun) someone who makes charitable donations intended to increase human well-being | Synonyms: philanthropist |
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| casuist | (noun) someone whose reasoning is subtle and often specious | Synonyms: sophist |
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| linguist | (noun) a person who speaks more than one language | Synonyms: polyglot |
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| (noun) a specialist in linguistics | Synonyms: linguistic scientist |
| neurolinguist | (noun) someone trained in neuroscience and linguistics who studies brain processes during language production and reception | - |
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| psycholinguist | (noun) a person (usually a psychologist but sometimes a linguist) who studies the psychological basis of human language | - |
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| sociolinguist | (noun) a linguist who studies the social and cultural factors that influence linguistic communication | - |
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| somniloquist | (noun) someone who talks while asleep | - |
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| ventriloquist | (noun) a performer who projects the voice into a wooden dummy | - |
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