gran casa vs bass drum

gran casa and bass drum both are nouns.

Word	Noun	Adjective	Verb	Adverb
gran casa	Yes	No	No	No
bass drum	Yes	No	No	No

As nouns, gran casa and bass drum are synonyms defined as:

gran casa and bass drum: a large drum with two heads; makes a sound of indefinite but very low pitch

gran casa (noun)	bass drum (noun)
a large drum with two heads; makes a sound of indefinite but very low pitch	a large drum with two heads; makes a sound of indefinite but very low pitch