spider nevus vs vascular spider

spider nevus and vascular spider both are nouns.

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

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

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

Other synonyms of spider nevus include spider angioma.

spider nevus (noun)	vascular spider (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