notch vs nock

notch is a noun but nock is not a noun.

Word	Noun	Adjective	Verb	Adverb
notch	Yes	No	Yes	No
nock	No	No	Yes	No

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

Other hyponyms of notch include mark, score, indent.

notch (noun)	nock (noun)
a small cut
a V-shaped or U-shaped indentation carved or scratched into a surface
the location in a range of mountains of a geological formation that is lower than the surrounding peaks
a V-shaped indentation

notch (verb)	nock (verb)
notch a surface to record something	make small marks into the surface of
cut or make a notch into