affect vs take a dive

affect is a noun but take a dive is not a noun.

Word	Noun	Adjective	Verb	Adverb
affect	Yes	No	Yes	No
take a dive	No	No	Yes	No

As verbs, take a dive is a hyponym of affect; that is, take a dive is a word with a more specific, narrower meaning than affect:

Other hyponyms of affect include play possum, bull, bullshit, fake, talk through one's hat, mouth.

affect (noun)	take a dive (noun)
the conscious subjective aspect of feeling or emotion

affect (verb)	take a dive (verb)
act physically on; have an effect upon	pretend to be knocked out, as of a boxer
have an effect upon
make believe with the intent to deceive
have an emotional or cognitive impact upon
connect closely and often incriminatingly