overhasty vs precipitant

overhasty is not a noun while precipitant is a noun.

Word	Noun	Adjective	Verb	Adverb
overhasty	No	Yes	No	No
precipitant	Yes	Yes	No	No

As adjectives, overhasty and precipitant are synonyms defined as:

overhasty and precipitant: done with very great haste and without due deliberation

Other synonyms of overhasty include hasty, precipitate, precipitous.

overhasty (noun)	precipitant (noun)
	an agent that causes a precipitate to form

overhasty (adjective)	precipitant (adjective)
done with very great haste and without due deliberation	done with very great haste and without due deliberation