vascular spider vs spider nevus

vascular spider and spider nevus both are nouns.

Word	Noun	Adjective	Verb	Adverb
vascular spider	Yes	No	No	No
spider nevus	Yes	No	No	No

As nouns, vascular spider and spider nevus are synonyms defined as:

vascular spider and spider nevus: a dilation of superficial capillaries with a central red dot from which blood vessels radiate

Other synonyms of vascular spider include spider angioma.

vascular spider (noun)	spider nevus (noun)
a dilation of superficial capillaries with a central red dot from which blood vessels radiate	a dilation of superficial capillaries with a central red dot from which blood vessels radiate