Nouns

(n)honkytonk, divea cheap disreputable nightclub or dance hall
(n)dive, divinga headlong plunge into water
(n)dive, nose dive, nosedivea steep nose-down descent by an aircraft

Verbs

(v)dive, plunge, plunkdrop steeply“the stock market plunged”
(v)diveplunge into water“I was afraid to dive from the board into the pool”
(v)diveswim under water“the children enjoyed diving and looking for shells”