license fee vs licensing fee

license fee and licensing fee both are nouns.

Word	Noun	Adjective	Verb	Adverb
license fee	Yes	No	No	No
licensing fee	Yes	No	No	No

As nouns, license fee and licensing fee are synonyms defined as:

license fee and licensing fee: a fee paid to the government for the privilege of being licensed to do something (as selling liquor or practicing medicine)

Other synonyms of license fee include license tax.

license fee (noun)	licensing fee (noun)
a fee paid to the government for the privilege of being licensed to do something (as selling liquor or practicing medicine)	a fee paid to the government for the privilege of being licensed to do something (as selling liquor or practicing medicine)