sense of humor vs playfulness

sense of humor and playfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sense of humor	Yes	No	No	No
playfulness	Yes	No	No	No

As nouns, playfulness is a hypernym of sense of humor; that is, playfulness is a word with a broader meaning than sense of humor:

sense of humor: the trait of appreciating (and being able to express) the humorous
playfulness: a disposition to find (or make) causes for amusement

Other hypernyms of sense of humor include fun.

sense of humor (noun)	playfulness (noun)
the trait of appreciating (and being able to express) the humorous	activities that are enjoyable or amusing
	a disposition to find (or make) causes for amusement
	a festive merry feeling