decimal point vs percentage point

decimal point and percentage point both are nouns.

Word	Noun	Adjective	Verb	Adverb
decimal point	Yes	No	No	No
percentage point	Yes	No	No	No

As nouns, decimal point and percentage point are synonyms defined as:

decimal point and percentage point: the dot at the left of a decimal fraction

Other synonyms of decimal point include point.

decimal point (noun)	percentage point (noun)
the dot at the left of a decimal fraction	the dot at the left of a decimal fraction