krab

As nouns the difference between krab and drab

is that krab is short for carabiner while drab is a fabric, usually of thick wool or cotton, having a drab colour.

As an adjective drab is

dull, uninteresting, particularly of colour.

As a verb drab is

to consort with prostitutes.

As nouns the difference between grab and krab

is that grab is a sudden snatch (for something while krab is short for carabiner.

As a verb grab

is to grip suddenly; to seize; to clutch.