giddiness vs dizziness

giddiness and dizziness both are nouns.

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

As nouns, giddiness and dizziness are synonyms defined as:

giddiness and dizziness: a reeling sensation; a feeling that you are about to fall

Other synonyms of giddiness include lightheadedness, vertigo.

giddiness (noun)	dizziness (noun)
an impulsive scatterbrained manner	a reeling sensation; a feeling that you are about to fall
a reeling sensation; a feeling that you are about to fall