premature vs previous

premature and previous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
premature	No	Yes	No	No
previous	No	Yes	No	No

As adjectives, premature and previous are synonyms defined as:

premature (adjective)	previous (adjective)
born after a gestation period of less than the normal time	too soon or too hasty
uncommonly early or before the expected time	(used especially of persons) of the immediate past
too soon or too hasty	just preceding something else in time or order