delve vs spade

delve is not a noun while spade is a noun.

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

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

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

delve (noun)	spade (noun)
	a sturdy hand shovel that can be pushed into the earth with the foot
	a playing card in the major suit that has one or more black figures on it

delve (verb)	spade (verb)
turn up, loosen, or remove earth	dig (up) with a spade