We found 2 dictionaries that define the word treasonists:

General (2 matching dictionaries)

1. treasonists: Vocabulary.com
2. treasonists: Wiktionary

(Note: See treasonist as well.)

Definitions from Wiktionary (treasonist) ▸ noun:  One who commits treason. ▸ Also see treasonist ▸ Words similar to treasonists ▸ Usage examples for treasonists ▸ Idioms related to treasonists ▸ Wikipedia articles (New!) ▸ Popular adjectives describing treasonists ▸ Words that often appear near treasonists ▸ Rhymes of treasonists ▸ Invented words related to treasonists