As adjectives the difference between treasonous and disloyal
is that treasonous
is like or in the way of treason while disloyal
is without loyalty; faithless, traitorous.
Like or in the way of treason.
:His treasonous actions earned Benedict Arnold eternal scorn.
without loyalty; faithless, traitorous.
* 1623 , , Act i, scene 1,
- O disloyal thing, That shouldst repair my youth, thou heap'st A year's age on me.