treasonably vs treacherously

treasonably and treacherously both are adverbs.

Word	Noun	Adjective	Verb	Adverb
treasonably	No	No	No	Yes
treacherously	No	No	No	Yes

As adverbs, treasonably and treacherously are synonyms defined as:

Other synonyms of treasonably include faithlessly, false, traitorously.

treasonably (adverb)	treacherously (adverb)
in a disloyal and faithless manner	in a disloyal and faithless manner