expend vs pervert

expend is not a noun while pervert is a noun.

Word	Noun	Adjective	Verb	Adverb
expend	No	No	Yes	No
pervert	Yes	No	Yes	No

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

expend (noun)	pervert (noun)
	a person whose behavior deviates from what is acceptable especially in sexual behavior

expend (verb)	pervert (verb)
use up (resources or materials)	change the inherent purpose or function of something
pay out	practice sophistry; change the meaning of or be vague about in order to mislead or deceive
	corrupt morally or by intemperance or sensuality