Synonyms For "Unknown" :
1 syllable:
2 syllables:
chartless, nameless, obscure, stranger, unmapped, unnamed, unsung
3 syllables:
alien, unbeknown, unbeknownst, uncharted, unexplored
4 syllables:
anonymous, inglorious, unacknowledged, undiagnosed, undiscovered, unfamiliar, unsuspected