lightsomeness vs giddiness

lightsomeness and giddiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
lightsomeness	Yes	No	No	No
giddiness	Yes	No	No	No

As nouns, giddiness is a hypernym of lightsomeness; that is, giddiness is a word with a broader meaning than lightsomeness:

Other hypernyms of lightsomeness include silliness.

lightsomeness (noun)	giddiness (noun)
the trait of being lighthearted and frivolous	an impulsive scatterbrained manner
the gracefulness of a person or animal that is quick and nimble	a reeling sensation; a feeling that you are about to fall
the cheerful feeling you have when nothing is troubling you