breastplate, aegis, egis
['mortar', 'lighter, light, igniter, ignitor', 'plate', 'sock', 'pot, flowerpot', 'chiton, coat-of-mail shell, sea cradle, polyplacophore', 'platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus']