| alien | (adjective) not contained in or deriving from the essential nature of something | Synonyms: foreign |
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| (adjective) being or from or characteristic of another place or part of the world | Synonyms: exotic |
| (noun) a person who comes from a foreign country; someone who does not owe allegiance to your country | Synonyms: foreigner, noncitizen, outlander |
| (noun) anyone who does not belong in the environment in which they are found | Synonyms: stranger, unknown |
| (noun) a form of life assumed to exist outside the Earth or its atmosphere | Synonyms: extraterrestrial, extraterrestrial being |
| (verb) transfer property or ownership | Synonyms: alienate |
| lien | (noun) the right to take another's property if an obligation is not discharged | - |
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| (noun) a large dark-red oval organ on the left side of the body between the stomach and the diaphragm; produces cells involved in immune responses | Synonyms: spleen |