porphyry vs igneous rock

porphyry and igneous rock both are nouns.

Word	Noun	Adjective	Verb	Adverb
porphyry	Yes	No	No	No
igneous rock	Yes	No	No	No

As nouns, igneous rock is a hypernym of porphyry; that is, igneous rock is a word with a broader meaning than porphyry:

porphyry: any igneous rock with crystals embedded in a finer groundmass of minerals
igneous rock: rock formed by the solidification of molten magma

porphyry (noun)	igneous rock (noun)
any igneous rock with crystals embedded in a finer groundmass of minerals	rock formed by the solidification of molten magma