kerwallop

As nouns the difference between onrush and kerwallop

is that onrush is a forceful rush or flow forward while kerwallop is a sudden wallop or onrush.

As an adverb kerwallop is

with a sudden wallop or onrush.

As nouns the difference between wallop and kerwallop

is that wallop is a heavy blow, punch while kerwallop is a sudden wallop or onrush.

As a verb wallop

is to rush hastily or wallop can be (internet) to write a message to all operators on an internet relay chat server.

As an adverb kerwallop is

with a sudden wallop or onrush.

As adverbs the difference between sudden and kerwallop

is that sudden is (poetic) suddenly while kerwallop is with a sudden wallop or onrush.

As nouns the difference between sudden and kerwallop

is that sudden is (obsolete) an unexpected occurrence; a surprise while kerwallop is a sudden wallop or onrush.

As an adjective sudden

is happening quickly and with little or no warning.