sex vs amorousness

sex and amorousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
amorousness	Yes	No	No	No

sex (noun)	amorousness (noun)
activities associated with sexual intercourse	a feeling of love or fondness
the properties that distinguish organisms on the basis of their reproductive roles	the arousal of feelings of sexual desire
all of the feelings resulting from the urge to gratify sexual impulses
either of the two categories (male or female) into which most organisms are divided

sex (verb)	amorousness (verb)
tell the sex (of young chickens)
to evoke sexual feelings