deviationism vs defection

deviationism and defection both are nouns.

Word	Noun	Adjective	Verb	Adverb
deviationism	Yes	No	No	No
defection	Yes	No	No	No

As nouns, defection is a hypernym of deviationism; that is, defection is a word with a broader meaning than deviationism:

deviationism: ideological defection from the party line (especially from orthodox communism)
defection: withdrawing support or help despite allegiance or responsibility

Other hypernyms of deviationism include abandonment, desertion.

deviationism (noun)	defection (noun)
ideological defection from the party line (especially from orthodox communism)	withdrawing support or help despite allegiance or responsibility
	the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes)