glee vs mirthfulness

glee and mirthfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
glee	Yes	No	No	No
mirthfulness	Yes	No	No	No

As nouns, glee and mirthfulness are synonyms defined as:

Other synonyms of glee include gleefulness, hilarity, mirth.

glee (noun)	mirthfulness (noun)
great merriment	great merriment
malicious satisfaction