merriment vs playfulness

merriment and playfulness both are nouns.

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

As nouns, merriment and playfulness are synonyms defined as:

Other synonyms of merriment include fun.

merriment (noun)	playfulness (noun)
activities that are enjoyable or amusing	activities that are enjoyable or amusing
a gay feeling	a disposition to find (or make) causes for amusement
	a festive merry feeling