use vs expend

use is a noun but expend is not a noun.

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

As verbs, use and expend are synonyms defined as:

Other synonyms of use include consume, deplete, eat, eat up, exhaust, run through, use up, wipe out.

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

use (noun)	expend (noun)
the act of using
(psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition
exerting shrewd or devious influence especially for one's own advantage
what something is used for
a particular service
(law) the exercise of the legal right to enjoy the benefits of owning property
(economics) the utilization of economic goods to satisfy needs or in manufacturing

use (verb)	expend (verb)
put into service; make work or employ for a particular purpose or for its inherent or natural purpose	use up (resources or materials)
take or consume (regularly or habitually)	pay out
use up (resources or materials)
habitually do something or be in a certain state or place (use only in the past tense)
avail oneself to
seek or achieve an end by using to one's advantage