turn over vs spade

turn over is not a noun while spade is a noun.

Word	Noun	Adjective	Verb	Adverb
turn over	No	No	Yes	No
spade	Yes	No	Yes	No

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

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

turn over (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

turn over (verb)	spade (verb)
think about carefully; weigh	dig (up) with a spade
turn up, loosen, or remove earth
turn upside down, or throw so as to reverse
turn from an upright or normal position
cause to overturn from an upright or normal position
move by turning over or rotating
cause to move around a center so as to show another side of
place into the hands or custody of
do business worth a certain amount of money