exclamation point vs exclamation mark

exclamation point and exclamation mark both are nouns.

Word	Noun	Adjective	Verb	Adverb
exclamation point	Yes	No	No	No
exclamation mark	Yes	No	No	No

As nouns, exclamation point and exclamation mark are synonyms defined as:

exclamation point and exclamation mark: a punctuation mark (!) used after an exclamation

exclamation point (noun)	exclamation mark (noun)
a punctuation mark (!) used after an exclamation	a punctuation mark (!) used after an exclamation