spider nevus vs angioma

spider nevus and angioma both are nouns.

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

As nouns, angioma is a hypernym of spider nevus; that is, angioma is a word with a broader meaning than spider nevus:

spider nevus: a dilation of superficial capillaries with a central red dot from which blood vessels radiate
angioma: a tumor consisting of a mass of blood or lymphatic vessels

spider nevus (noun)	angioma (noun)
a dilation of superficial capillaries with a central red dot from which blood vessels radiate	a tumor consisting of a mass of blood or lymphatic vessels