termination vs sequel

termination and sequel both are nouns.

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

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

Other hyponyms of termination include denouement, deal, decision, decision, aftermath, consequence, separation, subsequence, worst.

termination (noun)	sequel (noun)
the act of ending something	a part added to a book or play that continues and extends it
the end of a word (a suffix or inflectional ending or final morpheme)	something that follows something else
something that results
a place where something ends or is complete
a coming to an end of a contract period