reply vs non sequitur

reply and non sequitur both are nouns.

Word	Noun	Adjective	Verb	Adverb
reply	Yes	No	Yes	No
non sequitur	Yes	No	No	No

As nouns, non sequitur is a hyponym of reply; that is, non sequitur is a word with a more specific, narrower meaning than reply:

Other hyponyms of reply include counterblast, comeback, counter, rejoinder, replication, retort, return, riposte, echo, answer.

reply (noun)	non sequitur (noun)
the speech act of continuing a conversational exchange	(logic) a conclusion that does not follow from the premises
a statement (either spoken or written) that is made to reply to a question or request or criticism or accusation	a reply that has no relevance to what preceded it

reply (verb)	non sequitur (verb)
react verbally