heap [heaped, heaping, heaps](to pile in a heap) verb [UK: hiːp] [US: ˈhiːp]
pile [piled, piling, piles](to lay or throw into a pile) verb [UK: paɪl] [US: ˈpaɪl]We piled the wood in the backyard. = Abbiamo accatastato la legna nel cortile di casa.
stack [stacked, stacking, stacks](To place objects or material in the form of a stack) verb [UK: stæk] [US: ˈstæk]