knab

As verbs the difference between gnaw and knab

is that gnaw is to bite something persistently, especially something tough while knab is (colloquial) to nab or steal.

As verbs the difference between steal and knab

is that steal is (lb) to take illegally, or without the owner's permission, something owned by someone else while knab is (colloquial) to nab or steal.

As a noun steal

is the act of stealing.

As verbs the difference between nab and knab

is that nab is to seize, arrest or take into custody a criminal or fugitive while knab is to nab or steal.

As a noun nab

is the summit of an eminence.

As an initialism NAB

is National Australia Bank.