Crossword solverSynonyms for building block21 crossword answers for “building block” (8,5), sorted by letter count.How many letters?All21314153627182921131211321421613 letters 1key4 letters 1unit5 letters 3groupchainthing6 letters 2coupleashlar7 letters 1radical8 letters 2moleculekeystone9 letters 2headstonemolecular11 letters 3breeze block(6,5)cinder block(6,5)bimolecular12 letters 1clinker block(7,5)13 letters 2chemical group(8,5)chemical chain(8,5)14 letters 2intermolecularintramolecular16 letters 1building material(8,8)