This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Simple past tense and past participle of nosedive.

"The Liberals, as the economy nosedived, quite rightly forced the Harper government into a program of stimulus spending that they knew very well would cause a deficit, indeed quite a substantial one."

nose-dive   

nosedived    nosedives    nosediving   

descent    diminution    decline    dive    plunge   

power dive   

overbuilding    subduction    stagflation    neck-and-neck    pre-eclampsia