treasonable vs treasonous

treasonable and treasonous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
treasonable	No	Yes	No	No
treasonous	No	Yes	No	No

As adjectives, treasonable and treasonous are synonyms defined as:

treasonable and treasonous: having the character of, or characteristic of, a traitor

Other synonyms of treasonable include faithless, traitorous, unfaithful.

treasonable (adjective)	treasonous (adjective)
having the character of, or characteristic of, a traitor	having the character of, or characteristic of, a traitor