suckle vs sex

suckle is not a noun while sex is a noun.

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

suckle (noun)	sex (noun)
	activities associated with sexual intercourse
	the properties that distinguish organisms on the basis of their reproductive roles
	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

suckle (verb)	sex (verb)
give suck to	tell the sex (of young chickens)
suck milk from the mother's breasts	to evoke sexual feelings