simple past tense and past participle of knock wood

Laportea canadensis, an annual or perennial herbaceous plant of the nettle family Urticaceae, native to eastern and central North America.

A floor covering made of thin pieces of wood secured to a flexible backing, such as cloth.

The Laurentian Mixed Forest Province, a forested ecoregion in the United States and Canada.

(mycology) An edible polypore mushroom, Grifola frondosa

plural of wood-pigeon

Alternative form of wood pigeon

An inner suburb of Detroit with a population of roughly 14,000.

xylan

The mahogany tree (Swietenia mahogoni). / A West Indian leguminous tree (Lysiloma latisiliquum) whose wood is used for boat trimming.