Alien and Unsolved

Alien

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

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

Unsolved

Unsolved adjective - Not solved.

Alien and unsolved are semantically related. Sometimes you can use "Alien" instead an adjective "Unsolved".
Cite this Source
Unsolved and Alien. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/alien/unsolved
Alien & Unsolved. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/alien/unsolved>.
Unsolved or Alien. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/alien/unsolved.
Google Ngram Viewer shows how "alien" and "unsolved" have occurred on timeline