giddiness vs vertigo

giddiness and vertigo both are nouns.

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

As nouns, giddiness and vertigo are synonyms defined as:

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

Other synonyms of giddiness include dizziness, lightheadedness.

giddiness (noun)	vertigo (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