sex vs sixty-nine

sex and sixty-nine both are nouns.

Word	Noun	Adjective	Verb	Adverb
sex	Yes	No	Yes	No
sixty-nine	Yes	Yes	No	No

sex (noun)	sixty-nine (noun)
activities associated with sexual intercourse	oral sex practiced simultaneously by two people
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 (adjective)	sixty-nine (adjective)
	being nine more than sixty

sex (verb)	sixty-nine (verb)
tell the sex (of young chickens)
to evoke sexual feelings