retirement vs termination

retirement and termination both are nouns.

Word	Noun	Adjective	Verb	Adverb
retirement	Yes	No	No	No
termination	Yes	No	No	No

As nouns, termination is a hypernym of retirement; that is, termination is a word with a broader meaning than retirement:

Other hypernyms of retirement include conclusion, ending.

retirement (noun)	termination (noun)
withdrawal from your position or occupation	the act of ending something
withdrawal for prayer and study and meditation	the end of a word (a suffix or inflectional ending or final morpheme)
the state of being retired from one's business or occupation	something that results
	a place where something ends or is complete
	a coming to an end of a contract period