nosedive

nouns

a sudden sharp drop or rapid decline
"the stock took a nosedive"
nosedive
is a type of (narrower)
change toward something smaller or lower
decline, diminution
a steep nose-down descent by an aircraft
dive, nose dive, nosedive

verbs

plunge nose first; drop with the nose or front first, of aircraft
nosedive
domain category
travel via aircraft
"air travel involves too much waiting in airports"; "if you've time to spare go by air"
air, air travel, aviation
is a type of (narrower)
drop steeply
"the stock market plunged"
dive, plunge, plunk