piggy bank, penny bank
['oil filter', 'cash machine, cash dispenser, automated teller machine, automatic teller machine, automated teller, automatic teller, ATM', 'harmonica, mouth organ, harp, mouth harp', 'coil, spiral, volute, whorl, helix', 'tennis ball', 'ant, emmet, pismire', 'breastplate, aegis, egis']