Supplial :: Suppletory (n.) That which is to supply what is wanted.
Suppliance :: Suppliance (n.) That which supplies a want; assistance; a gratification; satisfaction.
Suppliant :: Suppliant (a.) Asking earnestly and submissively; entreating; beseeching; supplicating.
Suppliant :: Suppliant (a.) Manifesting entreaty; expressive of supplication.