treasonable

As adjectives the difference between treasonable and treasonous

is that treasonable is involving or constituting treason while treasonous is like or in the way of treason.

Treasonable is a synonym of insidious.

As adjectives the difference between treasonable and insidious

is that treasonable is involving or constituting treason while insidious is producing harm in a stealthy, often gradual, manner.

As adjectives the difference between treasonable and perfidious

is that treasonable is involving or constituting treason while perfidious is of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance.

As adjectives the difference between treasonable and treacherous

is that treasonable is involving or constituting treason while treacherous is exhibiting treachery.

As adjectives the difference between treasonable and reasonable

is that treasonable is involving or constituting treason while reasonable is having the faculty of reason; endued with reason; rational.

As an adjective treasonable

is involving or constituting treason.

As a noun treasonableness is

the quality of being treasonable.

As an adjective treasonable

is involving or constituting treason.

As an adverb treasonably is

in a treasonable manner.