secern vs sex

secern is not a noun while sex is a noun.

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

As verbs, sex is a hyponym of secern; that is, sex is a word with a more specific, narrower meaning than secern:

secern (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

secern (verb)	sex (verb)
mark as different	tell the sex (of young chickens)
	to evoke sexual feelings