Alien and Frontier

Alien

Alien adjective - Being, relating to, or characteristic of a country other than one's own.

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Frontier and alien are semantically related. In some cases you can use "Frontier" instead an adjective "Alien".

Frontier adjective - Located at or near a border.

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Alien and frontier are semantically related. Sometimes you can use "Alien" instead an adjective "Frontier".

Nearby Word: frontiersman

old	old alien	old frontier
short	short alien	short frontier
complete	complete alien	complete frontier
original	original alien	original frontier
Other adjectives: small, actual, real, dangerous, hostile, ancient, last, pink.

The year is 3871, and you take the role of a lone survivor on a frontier outpost that's been attacked by sinister-looking alien larvae.

Source: Video Game / Xenopods
First Frontier has a classic example of an alien using an alien swearword in the middle of an English sentence.

Source: Literature / Doctor Who New Adventures
While this is not your goal in XCOM: Interceptor, as various corporations are the ones who set up mining bases in the Frontier, your task is protecting them from alien attacks.

Source: Settling the Frontier

Cite this Source

Frontier and Alien. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/alien/frontier

Alien & Frontier. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/alien/frontier>.

Frontier or Alien. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/alien/frontier.

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