breccia vs rudaceous rock

breccia and rudaceous rock both are nouns.

Word	Noun	Adjective	Verb	Adverb
breccia	Yes	No	No	No
rudaceous rock	Yes	No	No	No

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

breccia: a rudaceous rock consisting of sharp fragments embedded in clay or sand
rudaceous rock: a sedimentary rock formed of coarse-grained material

breccia (noun)	rudaceous rock (noun)
a rudaceous rock consisting of sharp fragments embedded in clay or sand	a sedimentary rock formed of coarse-grained material