extensor vs extend

extensor is a noun but extend is not a noun.

Word	Noun	Adjective	Verb	Adverb
extensor	Yes	No	No	No
extend	No	No	Yes	No

extensor (noun)	extend (noun)
a skeletal muscle whose contraction extends or stretches a body part

extensor (verb)	extend (verb)
	extend one's limbs or muscles, or the entire body
	thrust or extend out
	extend in scope or range or area
	lengthen in time; cause to be or last longer
	continue or extend
	expand the influence of
	increase in quantity or bulk by adding a cheaper substance
	prolong the time allowed for payment of
	use to the utmost; exert vigorously or to full capacity
	open or straighten out; unbend
	extend or stretch out to a greater or the full length
	cause to move at full gallop
	offer verbally
	make available; provide
	span an interval of distance, space or time
	reach outward in space
	stretch out over a distance, space, time, or scope; run or extend between two points or beyond a certain point