fresh start vs clean slate

fresh start and clean slate both are nouns.

Word	Noun	Adjective	Verb	Adverb
fresh start	Yes	No	No	No
clean slate	Yes	No	No	No

As nouns, fresh start and clean slate are synonyms defined as:

fresh start and clean slate: an opportunity to start over without prejudice

Other synonyms of fresh start include tabula rasa.

fresh start (noun)	clean slate (noun)
an opportunity to start over without prejudice	an opportunity to start over without prejudice