very lively and profitable; "flourishing businesses"; "a palmy time for stockbrokers"; "a prosperous new business"; "doing a roaring trade"; "a thriving tourist center"; "did a thriving business in orchids"

used of the voice

Advancing or increasing amid noisy excitement; as, booming prices; booming popularity. [Colloq. U. S.]

adjective

boomy , prospering , prosperous , roaring , thrifty , thriving