stony coral vs madriporian coral

stony coral and madriporian coral both are nouns.

Word	Noun	Adjective	Verb	Adverb
stony coral	Yes	No	No	No
madriporian coral	Yes	No	No	No

As nouns, stony coral and madriporian coral are synonyms defined as:

stony coral and madriporian coral: corals having calcareous skeletons aggregations of which form reefs and islands

Other synonyms of stony coral include madrepore.

stony coral (noun)	madriporian coral (noun)
corals having calcareous skeletons aggregations of which form reefs and islands	corals having calcareous skeletons aggregations of which form reefs and islands