tambor
/tamˈboɾ/ · B2 · noun · m
drum
🥁 tambor ≈ tambourine, its little cousin; both come from Arabic for drum
Spanish tambor and English tambourine share a root, traced through Arabic and Persian words for a drum or lute. Drop the -ine ending and you have tambor. The architecture sense is the same word: a drum is the round wall that holds up a dome.