hasty vs overhasty

hasty and overhasty both are adjectives.

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

As adjectives, hasty and overhasty are synonyms defined as:

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

Other synonyms of hasty include precipitant, precipitate, precipitous.

hasty (adjective)	overhasty (adjective)
excessively quick	done with very great haste and without due deliberation
done with very great haste and without due deliberation