secretly vs on the Q.T.

secretly and on the Q.T. both are adverbs.

Word	Noun	Adjective	Verb	Adverb
secretly	No	No	No	Yes
on the Q.T.	No	No	No	Yes

As adverbs, secretly and on the Q.T. are synonyms defined as:

Other synonyms of secretly include in secret, on the QT.

secretly (adverb)	on the Q.T. (adverb)
in secrecy; not openly	in secrecy; not openly
not openly; inwardly