This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A fall or slide of a large mass, as of snow or rock, down a mountainside.

n. A massive or overwhelming amount; a flood: received an avalanche of mail.

verb-intransitive. To fall or slide in a massive or overwhelming amount.

v. To overwhelm; inundate.

n. A large mass or body of snow and ice sliding swiftly down a mountain side, or falling down a precipice.

n. A fall of earth, rocks, etc., similar to that of an avalanche of snow or ice.

n. A sudden, great, or irresistible descent or influx of anything.

n. Anything like an avalanche in suddenness and overwhelming quantity (like a barrage, blitz, etc).

v. To descend like an avalanche.

v. To come down upon; to overwhelm.

n. A large mass or body of snow and ice sliding swiftly down a mountain side, or falling down a precipice.

n. A fall of earth, rocks, etc., similar to that of an avalanche of snow or ice.

n. A sudden, great, or irresistible descent or influx of anything.

n. The fall or sliding down of a mass of snow or ice from a mountain-slope.

n. Hence—2. Anything resembling an avalanche in suddenness and destructiveness: as, an avalanche of misfortunes.

n. a slide of large masses of snow and ice and mud down a mountain

v. gather into a huge mass and roll down a mountain, of snow

n. a sudden appearance of an overwhelming number of things

"Whatever doubts the professor may have had were swept away in what he called an "avalanche of congratulations"."

avalanched    avalanches    avalanching   

godown    fall    descend    comedown    occurrent    happening    occurrence    natural event   

slide    lauwine    landslide    landslip    snowslide    snowslip    glissade    éboulement    eboulement   

tornado    blizzard    torrent    whirlwind    earthquake    deluge    tempest    flood    geyser    hail