Table of Contents POS
HYPHEN
COUNT IN NET
WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS

WORDNET DICTIONARY

Noun rainstorm has 1 sense

• rainstorm(n = noun.phenomenon) Array - a storm with rain; Array
is a kind of storm, violent storm, rain, rainfall
has particulars: equinoctial storm, line storm, thundershower

OXFORD DICTIONARY

THESAURUS

rainstorm

brash, burst of rain, cloudburst, cyclone, deluge, dirty weather, downfall, downflow, downpour, drencher, flood, foul weather, gushing rain, heavy rain, hurricane, line squall, plash, pour, rainburst, rainspout, rough weather, scud, snowstorm, soaker, soaking rain, spate, spout, squall, storm, stormy weather, tempest, tempestuous rage, thunderstorm, tornado, torrent of rain, typhoon, waterspout, windstorm

For further exploring for "rainstorm" in Webster Dictionary Online