Synonyms : fountain, natural spring, outflow, spring

Example : He heard the flush of a toilet.
There was a little gush of blood.
She attacked him with an outpouring of words.

Synonyms : flush, gush

Synonyms : discharge, run

Example : A barrage of questions.
A bombardment of mail complaining about his mistake.

Synonyms : barrage, bombardment, onslaught

Synonyms : flood, overflow