delve vs groove

delve is not a noun while groove is a noun.

Word	Noun	Adjective	Verb	Adverb
delve	No	No	Yes	No
groove	Yes	No	Yes	No

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

Other hyponyms of delve include furrow, rut, root, rootle, rout, spade, shovel, trowel, burrow, tunnel.

delve (noun)	groove (noun)
	a settled and monotonous routine that is hard to escape
	(anatomy) any furrow or channel on a bodily structure or part
	a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record)

delve (verb)	groove (verb)
turn up, loosen, or remove earth	hollow out in the form of a furrow or groove
	make a groove in, or provide with a groove