spiny lizard spi·ny·li·zard uncommon noun 1. desert lizard that feeds on ants Synonymsmountain devilspiny lizardMoloch horridus 2. any of numerous lizards with overlapping ridged pointed scales; of North America and Central America Synonymsspiny lizard Related words Broader terms iguanidmoloch Narrower terms fence lizardsagebrush lizard Parts Sceloporusgenus Moloch WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.