angioma vs spider nevus

angioma and spider nevus both are nouns.

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

As nouns, spider nevus is a hyponym of angioma; that is, spider nevus is a word with a more specific, narrower meaning than angioma:

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

Other hyponyms of angioma include haemangioma, hemangioma, lymphangioma, spider angioma, vascular spider.

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