conk vs succumb

conk is a noun but succumb is not a noun.

Word	Noun	Adjective	Verb	Adverb
conk	Yes	No	Yes	No
succumb	No	No	Yes	No

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

conk: pass from physical life and lose all bodily attributes and functions necessary to sustain life
succumb: be fatally overwhelmed

Other hyponyms of conk include abort, asphyxiate, stifle, suffocate, buy it, pip out, drown, predecease, famish, starve, fall, yield.

conk (noun)	succumb (noun)
informal term for the nose

conk (verb)	succumb (verb)
pass out from weakness, physical or emotional distress due to a loss of blood supply to the brain	consent reluctantly
pass from physical life and lose all bodily attributes and functions necessary to sustain life	be fatally overwhelmed
hit, especially on the head
come to a stop