playfulness vs fun

playfulness and fun both are nouns.

Word	Noun	Adjective	Verb	Adverb
playfulness	Yes	No	No	No
fun	Yes	No	No	No

As nouns, playfulness and fun are synonyms defined as:

Other synonyms of playfulness include merriment.

As nouns, playfulness and fun are synonyms defined as:

playfulness and fun: a disposition to find (or make) causes for amusement

playfulness (noun)	fun (noun)
activities that are enjoyable or amusing	activities that are enjoyable or amusing
a disposition to find (or make) causes for amusement	violent and excited activity
a festive merry feeling	a disposition to find (or make) causes for amusement
	verbal wit or mockery (often at another's expense but not to be taken seriously)