As a noun rainstorm
is a storm characterized by substantial, heavy rainfall.
As an adjective rainstormy is
undergoing a rainstorm.
rainstorm
English
Noun
(
en noun)
A storm characterized by substantial, heavy rainfall.
* , chapter=8
, title=
Mr. Pratt's Patients
, passage=Philander went into the next room
See also
* thunderstorm
* deluge
* snowstorm
* hailstorm