abandonment vs apostasy

abandonment and apostasy both are nouns.

Word	Noun	Adjective	Verb	Adverb
abandonment	Yes	No	No	No
apostasy	Yes	No	No	No

As nouns, apostasy is a hyponym of abandonment; that is, apostasy is a word with a more specific, narrower meaning than abandonment:

Other hyponyms of abandonment include exposure, tergiversation, bolt.

abandonment (noun)	apostasy (noun)
withdrawing support or help despite allegiance or responsibility	the act of abandoning a party for cause
the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away	the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes)
the act of giving something up