Open English Wordnet
Nouns
(n)treadthe grooved surface of a pneumatic tire (n)treadthe part (as of a wheel or shoe) that makes contact with the ground (n)treadstructural member consisting of the horizontal part of a stair or step Verbs
(v)step, treadput down or press the foot, place the foot“For fools rush in where angels fear to tread”,
“step on the brake” (v)tread, trampletread or stomp heavily or roughly“The soldiers trampled across the fields” (v)treadcrush as if by treading on“tread grapes to make wine” (v)treadbrace (an archer's bow) by pressing the foot against the center (v)treadapply (the tread) to a tire (v)treadmate with (used of male birds)“male birds tread the females”