peach
桃 centers on the peach fruit, including the tree and its blossoms.
桃 combines 木 (tree) with 兆, which likely contributes the sound. The character refers to the peach tree and its fruit.
A tree 木 with a sign of abundance 兆: imagine a peach tree heavy with ripe fruit.
For トウ, picture a peach tree growing at the toe of a hill: toe -> トウ, and the tree is laden with peaches.
peach (Prunus persica)
walnut (Juglans spp., esp. Juglans regia)
Momotarō (Japanese folk tale and popular hero)
pink (colour, color); peach
white peach
peach orchard
Doll's Festival (March 3); Peach Festival
almond
someone who is bad at horse-riding
peach blossom
earthly paradise; Shangri-la
peach and plum
tonsil
earthly paradise; Shangri-la
cherry (tree; esp. sweet cherry or Nanking cherry)
lingonberry (Vaccinium vitis-idaea); cowberry
weeping peach (Prunus persica var. pendula)
common walnut (Juglans regia); Persian walnut; English walnut
apricot (Prunus armeniaca)
oleander; Nerium oleander var. indicum; rosebay