a natural elevation of the earth's surface rising more or less abruptly to a summit, and attaining an altitude greater than that of a hill, usually greater than 2000 ft. (610 m).

a large mass of something resembling this, as in shape or size.

a huge amount

a mountain of incoming mail.

( initial capital letter ) a steam locomotive having a four-wheeled front truck, eight driving wheels, and a two-wheeled rear truck.

Also called mountain wine. British Archaic . a sweet Malaga wine.

of or pertaining to mountains

mountain air.

living, growing, or located in the mountains

mountain people.

resembling or suggesting a mountain, as in size. ?

make a mountain out of a molehill. molehill ( def. 2 ) .

noun

crevasse , valley

noun

abundance , alp , bank , bluff , butte , cliff , crag , dome , drift , elevation , eminence , glob , heap , height , hump , mass , mesa , mound , mount , palisade , peak , pike , pile , precipice , pyramid , range , ridge , shock , sierra , stack , ton , tor , volcano , agglomeration , cumulus , hill , mess , tumble , much , plenty , profusion , wealth , world , arete , barrow , ben , berg , chain , cone , cordillera , crest , everest , fell , kop , mont , onlay , sawbuck , spur , summit