brownstone

n [U] reddish-brown sandstone used for building （建筑用的）褐沙石.

broth, brothel, brother, brother-in-law, brotherhood, brotherliness, brotherly, brougham, brought, brouhaha, brow, browbeat, browbeaten, brown, brown bread, brown paper, brown sugar, brownie, browning, brownish, browny, browse, bruise, bruiser, bruit, brunch, brunette, brunt, brush, brush aside, brush off, brush up, brush-off, brush-up, brushing, brushstroke, brushwood, brushwork, brusque, brusquely, brusqueness,