vertigo vs lightheadedness

vertigo and lightheadedness both are nouns.

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

As nouns, vertigo and lightheadedness are synonyms defined as:

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

Other synonyms of vertigo include dizziness, giddiness.

vertigo (noun)	lightheadedness (noun)
a reeling sensation; a feeling that you are about to fall	a frivolous lack of prudence
	a reeling sensation; a feeling that you are about to fall