tergiversation vs apostasy

tergiversation and apostasy both are nouns.

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

As nouns, tergiversation and apostasy are synonyms defined as:

tergiversation (noun)	apostasy (noun)
falsification by means of vague or ambiguous language	the act of abandoning a party for cause
the act of abandoning a party for cause	the state of having rejected your religious beliefs for your political party or a cause (often in favor of opposing beliefs or causes)