suck vs sexual activity

suck and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
suck	Yes	No	Yes	No
sexual activity	Yes	No	No	No

suck (noun)	sexual activity (noun)
the act of sucking	activities associated with sexual intercourse

suck (verb)	sexual activity (verb)
give suck to
draw into the mouth by creating a practical vacuum in the mouth
take in, also metaphorically
draw something in by or as if by a vacuum
provide sexual gratification through oral stimulation
be inadequate or objectionable
attract by using an inexorable force, inducement, etc.