on the fly vs hurridly

on the fly and hurridly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
on the fly	No	No	No	Yes
hurridly	No	No	No	Yes

As adverbs, on the fly and hurridly are synonyms defined as:

on the fly (adverb)	hurridly (adverb)
on the run or in a hurry	on the run or in a hurry
while in motion