sex vs severalize

sex is a noun but severalize is not a noun.

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

As verbs, severalize is a hypernym of sex; that is, severalize is a word with a broader meaning than sex:

Other hypernyms of sex include differentiate, distinguish, secern, secernate, separate, severalise, tell, tell apart.

sex (noun)	severalize (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

sex (verb)	severalize (verb)
tell the sex (of young chickens)	mark as different
to evoke sexual feelings	distinguish or separate