Synonyms of the word 
UNDISCLOSED → COVERT - UNREVEALED
undisclosed
- adj. Not disclosed; kept secret.
covert
- adj. (now rare) Hidden, covered over; overgrown, sheltered.
- adj. (figuratively) Secret, surreptitious, concealed.
- n. A covering.
- n. A disguise.
- n. A hiding place.
- n. Area of thick undergrowth where animals hide.
- n. (ornithology) A feather that covers the bases of flight feathers.
unrevealed
- adj. Not revealed; hidden; secret.
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