Synonyms|23Antonyms|0|Broader|1Narrower|0Related|10
4
unknown
2
riddle
1
dark horse
1
frontier
1
frontiers of knowledge(expression, idiom)
1
matter of ignorance(expression, idiom)
1
mystery
1
puzzle
1
sealed book
1
terra
1
unexplored ground
1
unexplored territory
1
unknown quantity
1
unknown region
0
ages
0
alien
0
backwoods(noun, adjective)
0
problem
0
sealed
0
soil
<12>
For more, visit Terra_incognita on Power Thesaurus
11 years ago|443 views|share |citing 
APASmart Define. (2015). terra incognita thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/terra_incognita/thesaurus/synonyms
ChicagoSmart Define. 2015. "terra incognita thesaurus" https://smartdefine.org/terra_incognita/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, terra incognita thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/terra_incognita/thesaurus/synonyms>.
MLASmart Define. "terra incognita thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/terra_incognita/thesaurus/synonyms>