On the sly synonyms | adjectives

Synonyms for On the sly as an Adjective

• private

  secret, sneaky
• on the QT

  secret, sneaky
• hush-hush

  secret, sneaky
• under cover

  in secret
• clandestine

  secret, sneaky
• hidden

  secret, sneaky
• experimental

  underground
• covert

  underground
• surreptitious

  underground
• furtive
• unauthorized
• revolutionary

  underground
• alternative

  underground
• avant-garde
• radical
• concealed
• resistant
• unbowed
• unconventional
• under wraps

  clandestine
• undercover

  clandestine
• unusual
• resistive
• under the table

  in hidden manner
• fraudulent
• sly
• stealthy
• underhand
• veiled
• sneaking
• hole-and-corner
• skulking
• slinking
• sub-rosa
• under-the-table
• hypogeal
• hypogean
• hypogeous
• subterranean
• underground
• secret
• avant garde
• sneaky
• unauthorised
• subversive
• volant
• soaring
• altitudinous
• aeriform
• volitant