roof of the mouth vs palate

roof of the mouth and palate both are nouns.

Word	Noun	Adjective	Verb	Adverb
roof of the mouth	Yes	No	No	No
palate	Yes	No	No	No

As nouns, roof of the mouth and palate are synonyms defined as:

roof of the mouth and palate: the upper surface of the mouth that separates the oral and nasal cavities

roof of the mouth (noun)	palate (noun)
the upper surface of the mouth that separates the oral and nasal cavities	the upper surface of the mouth that separates the oral and nasal cavities