一里塚[ichirizuka] milestone (1 ri apart)
アリ塚[arizuka] anthill
供養塚[kuyouzuka] unknown person's grave
貝塚[kaizuka] shell heap
比翼塚[hiyokuzuka] double grave of lovers who died together

筆塚[fudezuka] mound covering reverently buried old brushes
塚穴[tsukaana] grave
塚を築く[tsukawokizuku] to pile up a mound
手塚治虫文化賞[tezukaosamubunkashou] Tezuka Osamu Cultural Prize

ムール貝[muurugai] moule
一枚貝[ichimaigai] univalve
烏貝[karasugai] cockscomb pearl mussel (Cristaria plicata)
貝ボタン[kaibotan] mother-of-pearl button
貝貨[baika] shell money

貝がら[kaigara] shell
貝柱[kaibashira] adductor muscle
貝毒[kaidoku] shellfish poison
貝類[kairui] shellfish