Definition of hush-hush:
Synonyms for hush-hush:
stealth, inside, sneak, esoteric, secret, backstairs, underhand, auricular, mysterious, underhanded, underground, secretive, covert, clandestine, surreptitious, intimate, cloak-and-dagger, hole-and-corner, sub rosa, private, behind-the-scenes, sneaky, hugger-mugger, on the quiet, in strict confidence, show, privy, hushed, huggermugger, shadowy, sneaking, undercover, nonpublic.
- concealed (part of speech: adjective)
- secret (part of speech: adjective)