fun vs waggishness

fun and waggishness both are nouns.

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

As nouns, waggishness is a hyponym of fun; that is, waggishness is a word with a more specific, narrower meaning than fun:

fun: verbal wit or mockery (often at another's expense but not to be taken seriously)
waggishness: waggish behavior

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