Synonyms for alien

Noun

1. foreigner, alien, noncitizen, outlander, traveler, traveller

usage: a person who comes from a foreign country; someone who does not owe allegiance to your country

2. stranger, alien, unknown, intruder, interloper, trespasser

usage: anyone who does not belong in the environment in which they are found

3. extraterrestrial being, extraterrestrial, alien, hypothetical creature

usage: a form of life assumed to exist outside the Earth or its atmosphere

Verb

1. alien, alienate, transfer

usage: transfer property or ownership; "The will aliened the property to the heirs"

2. estrange, alienate, alien, disaffect, change, alter, modify

usage: arouse hostility or indifference in where there had formerly been love, affection, or friendliness

Adjective

1. alien, foreign, extrinsic (vs. intrinsic)

usage: not contained in or deriving from the essential nature of something; "an economic theory alien to the spirit of capitalism"; "the mysticism so foreign to the French mind and temper"; "jealousy is foreign to her nature"

2. alien, exotic, foreign (vs. native)

usage: being or from or characteristic of another place or part of the world; "alien customs"; "exotic plants in a greenhouse"; "exotic cuisine"