flood tide vs sexual activity

flood tide and sexual activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
flood tide	Yes	No	No	No
sexual activity	Yes	No	No	No

flood tide (noun)	sexual activity (noun)
the occurrence of incoming water (between a low tide and the following high tide)	activities associated with sexual intercourse
the highest point of anything conceived of as growing or developing or unfolding