Synonyms for on the sly
adj sneaky, secretAntonyms for on the sly
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.
secretly
adverb. in hidden manner
- behind closed doors
- behind someone's back
- by stealth
- clandestinely
- confidentially
- covertly
- furtively
- hush-hush
- in camera
- in confidence
- in holes and corners
- in secret
- in strict confidence
- insidiously
- intimately
- obscurely
- on the QT
- on the quiet
- on the sly
- personally
- privately
- privily
- quietly
- slyly
- stealthily
- sub rosa
- surreptitiously
- under the table
- underhandedly
- unobserved
surreptitious
adjective. sneaky, secret
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.