reversionist vs offender

reversionist and offender both are nouns.

Word	Noun	Adjective	Verb	Adverb
reversionist	Yes	No	No	No
offender	Yes	No	No	No

As nouns, offender is a hypernym of reversionist; that is, offender is a word with a broader meaning than reversionist:

reversionist: someone who lapses into previous undesirable patterns of behavior
offender: a person who transgresses moral or civil law

Other hypernyms of reversionist include wrongdoer.

reversionist (noun)	offender (noun)
someone who lapses into previous undesirable patterns of behavior	a person who transgresses moral or civil law