tread vs pneumatic tire

tread and pneumatic tire both are nouns.

Word	Noun	Adjective	Verb	Adverb
tread	Yes	No	Yes	No
pneumatic tire	Yes	No	No	No

tread (noun)	pneumatic tire (noun)
a step in walking or running	a tire made of reinforced rubber and filled with compressed air; used on motor vehicles and bicycles etc
structural member consisting of the horizontal part of a stair or step
the part (as of a wheel or shoe) that makes contact with the ground
the grooved surface of a pneumatic tire

tread (verb)	pneumatic tire (verb)
crush as if by treading on
brace (an archer's bow) by pressing the foot against the center
mate with (used of male birds)
tread or stomp heavily or roughly
put down or press the foot, place the foot
apply (the tread) to a tire