admission fee vs admission charge

admission fee and admission charge both are nouns.

Word	Noun	Adjective	Verb	Adverb
admission fee	Yes	No	No	No
admission charge	Yes	No	No	No

As nouns, admission fee and admission charge are synonyms defined as:

Other synonyms of admission fee include admission, admission price, entrance fee, entrance money, price of admission.

admission fee (noun)	admission charge (noun)
the fee charged for admission	the fee charged for admission