previous vs premature

previous and premature both are adjectives.

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

As adjectives, previous and premature are synonyms defined as:

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