2 Words to use with gratuity

Some trivial slips their daily walk attend, The poor are near at hand, the charge is small, A slight gratuity atones for all."Cowper.

*** We hear that visitors at a well-known London hotel, who have patiently borne the extension of the gratuity nuisance for a considerable time, now take exception to the notice, "Please tip the basin," which has been prominently placed in the lavatory.

2 Words to use with  gratuity