A source of relief is something that provides comfort or alleviates pain. The crossword solutions for this term are BALM (4 letters), BULLPEN (7 letters), SALVE (5 letters), OASIS (5 letters), and ANODYNE (7 letters). BALM is a fragrant ointment used to heal or soothe the skin. BULLPEN is a place where relief pitchers in baseball warm up before entering the game. SALVE is a healing ointment used to treat minor cuts and burns. OASIS is a place of rest and refreshment in a desert or wasteland. ANODYNE is a medicine or other substance that relieves pain.