spare vs deplete

spare is a noun but deplete is not a noun.

Word	Noun	Adjective	Verb	Adverb
spare	Yes	Yes	Yes	No
deplete	No	No	Yes	No

As verbs, deplete is a hypernym of spare; that is, deplete is a word with a broader meaning than spare:

Other hypernyms of spare include consume, eat, eat up, exhaust, expend, run through, use, use up, wipe out.

spare (noun)	deplete (noun)
a score in tenpins; knocking down all ten after rolling two balls
an extra car wheel and tire for a four-wheel vehicle
an extra component of a machine or other apparatus

spare (adjective)	deplete (adjective)
lacking in magnitude or quantity
thin and fit
lacking embellishment or ornamentation
not taken up by scheduled activities
more than is needed, desired, or required
kept in reserve especially for emergency use

spare (verb)	deplete (verb)
use frugally or carefully	use up (resources or materials)
give up what is not strictly needed
refrain from harming
save or relieve from an experience or action