Nouns

(n)wainscot, dadopanel forming the lower part of an interior wall when it is finished differently from the rest of the wall
(n)dadothe section of a pedestal between the base and the surbase
(n)dadoa rectangular groove cut into a board so that another piece can fit into it

Verbs

(v)dadoprovide with a dado“The owners wanted to dado their dining room”
(v)dadocut a dado into or fit into a dado