forsaking vs apostasy

forsaking and apostasy both are nouns.

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

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

Other hyponyms of forsaking include exposure, tergiversation, bolt.

forsaking (noun)	apostasy (noun)
the act of giving something up	the act of abandoning a party for cause
the act of forsaking	the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes)