jibe vs underpin

jibe is a noun but underpin is not a noun.

Word	Noun	Adjective	Verb	Adverb
jibe	Yes	No	Yes	No
underpin	No	No	Yes	No

As verbs, underpin is a hyponym of jibe; that is, underpin is a word with a more specific, narrower meaning than jibe:

jibe: be compatible, similar or consistent; coincide in their characteristics
underpin: support with evidence or authority or make more certain or confirm

jibe (noun)	underpin (noun)
an aggressive remark directed at a person like a missile and intended to have a telling effect

jibe (verb)	underpin (verb)
shift from one side of the ship to the other	support from beneath
be compatible, similar or consistent; coincide in their characteristics	support with evidence or authority or make more certain or confirm