hollow vs undermine

hollow is a noun but undermine is not a noun.

Word	Noun	Adjective	Verb	Adverb
hollow	Yes	Yes	Yes	No
undermine	No	No	Yes	No

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

hollow (noun)	undermine (noun)
a depression hollowed out of solid matter
a small valley between mountains
a cavity or space in something

hollow (adjective)	undermine (adjective)
not solid; having a space or gap or cavity
lacking in substance or character
devoid of significance or force
as if echoing in a hollow space

hollow (verb)	undermine (verb)
remove the interior of	hollow out as if making a cave or opening
remove the inner part or the core of	destroy property or hinder normal operations