vein vs mineral vein

vein and mineral vein both are nouns.

Word	Noun	Adjective	Verb	Adverb
vein	Yes	No	Yes	No
mineral vein	Yes	No	No	No

As nouns, vein and mineral vein are synonyms defined as:

vein (noun)	mineral vein (noun)
one of the horny ribs that stiffen and support the wing of an insect	a layer of ore between layers of rock
a blood vessel that carries blood from the capillaries toward the heart
a distinctive style or manner
a layer of ore between layers of rock
any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ

vein (verb)	mineral vein (verb)
make a veinlike pattern