Mortar is a material used in construction and is composed of a mixture of sand, water, and CEMENT. The crossword solutions for the term 'mortar' are GUN (3 letters), GLUE (4 letters), WEAPON (6 letters), PLASTER (7 letters), GROUT (5 letters), and CEMENT (6 letters). GUN is a WEAPON that fires bullets, GLUE is a sticky substance used to join two objects together, WEAPON is an instrument of attack or defense, PLASTER is a material used to coat walls and ceilings, GROUT is a paste used to fill gaps between tiles, and CEMENT is a binding material used in construction.