46 entries under indefinite topic. ×

7
mysterious(adjective, strange, new, remote)
7
unknown(adjective, obscure, strange, mysterious)
6
unascertained(adjective, strange, new, remote, mysterious)
5
strange(adjective, new, remote, mysterious)
5
undiscovered(adjective, strange, new, remote, mysterious)
4
unapprehended(adjective, strange, new, remote, mysterious)
4
unexplored(adjective, strange, new, remote, mysterious)
3
unfamiliar(adjective, strange, new, remote, mysterious)
3
unidentified(adjective, strange, new, remote, mysterious)
2
obscure(adjective, strange, unidentified, inexplicable)
2
uncharted(strange, new, remote, mysterious)
2
undetermined(strange, unidentified)
2
unheard-of(strange, new, remote, unidentified)
2
unperceived(strange, new, remote, mysterious)
2
unrevealed(strange, new, remote, mysterious)
1
X(strange, new, remote, mysterious)
1
alien(strange, new, remote, mysterious)
1
anonymous(strange, unidentified)
1
concealed(strange, new, remote, mysterious)
1
desolate(strange, new, remote, mysterious)
<123>
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APASmart Define. (2015). unexplained thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unexplained/thesaurus/synonyms
ChicagoSmart Define. 2015. "unexplained thesaurus" https://smartdefine.org/unexplained/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, unexplained thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unexplained/thesaurus/synonyms>.
MLASmart Define. "unexplained thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/unexplained/thesaurus/synonyms>