defection vs abandonment

defection and abandonment both are nouns.

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

As nouns, defection and abandonment are synonyms defined as:

defection and abandonment: withdrawing support or help despite allegiance or responsibility

Other synonyms of defection include desertion.

defection (noun)	abandonment (noun)
withdrawing support or help despite allegiance or responsibility	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)	the voluntary surrender of property (or a right to property) without attempting to reclaim it or give it away
	the act of giving something up