Strange, unfamiliar, unknown, foreign, extraterrestrial, creature from outer space, space invader or Martian.
synonym I had this for class.
The synonym of "foreign" is "alien" or "external."
newcomer, outlander, foreigner, outsider, alien
* alien * expatriate * nonnative * offshore * overseas
Alien Grays Little Green Men Martians
different, unusual, new, untried, strange, alien
alien, exotic, unknown, strange, imported, remote, unfamiliar
Strange, foreign, alien, outside, and extrinsic are all synonyms for extrinsic.
That would be ALIAS; Alien Lifeform Intended for Assassination and Sabotage.
Synonyms: exterior, alien, foreign Antonyms: Inside, internal.
One synonym for the word "foreign" is "international." This term is often used to describe things that are from or relate to other countries.
Native is a word. A synonym would be another word that means the same thing, such as aborigine or perhaps inhabitant. An antonym would be a word meaning the opposite, such as alien or immigrant.