gibe vs underpin

gibe is a noun but underpin is not a noun.

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

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

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

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

gibe (verb)	underpin (verb)
laugh at with contempt and derision	support from beneath
be compatible, similar or consistent; coincide in their characteristics	support with evidence or authority or make more certain or confirm