erect vs physiology

erect is not a noun while physiology is a noun.

Word	Noun	Adjective	Verb	Adverb
erect	No	Yes	Yes	No
physiology	Yes	No	No	No

erect (noun)	physiology (noun)
	processes and functions of an organism
	the branch of the biological sciences dealing with the functioning of organisms

erect (adjective)	physiology (adjective)
upright in position or posture
of sexual organs; stiff and rigid

erect (verb)	physiology (verb)
construct, build, or erect
cause to rise up