Alien and Infiltrator

Alien

Alien noun - A person who comes from a foreign country; someone who does not owe allegiance to your country.

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Infiltrator and alien are semantically related. In some cases you can use "Infiltrator" instead a noun "Alien".

Infiltrator noun - Someone who takes up a position surreptitiously for the purpose of espionage.

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Alien and infiltrator are semantically related. Sometimes you can use "Alien" instead a noun "Infiltrator".

old	old alien	old infiltrator
short	short alien	short infiltrator
single	single alien	single infiltrator
real	real alien	real infiltrator
Other adjectives: male, mysterious, disguised, different, captured, robotic, blonde.

Suspecting the official who opposes him the loudest is an infiltrator, the man shoots and kills him, hoping to expose his alien nature.

Source: Cruel Twist Ending
They suspect an Alien Invasion, and work to expose the infiltrator.

Source: Literature / My Teacher Is an Alien
The Commonwealth Saga has MorningLightMountain and the Starflyer, with one as the xenophobic alien invader and the other as the insidious infiltrator who clearly does not have humanity's interests in mind but would prefer humanity to remain alive until it can finish its own plans.

Source: Big Bad Ensemble

Cite this Source

Infiltrator and Alien. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/alien/infiltrator

Alien & Infiltrator. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/alien/infiltrator>.

Infiltrator or Alien. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/alien/infiltrator.

Google Ngram Viewer shows how "alien" and "infiltrator" have occurred on timeline