caterpillar track vs caterpillar tread

caterpillar track and caterpillar tread both are nouns.

Word	Noun	Adjective	Verb	Adverb
caterpillar track	Yes	No	No	No
caterpillar tread	Yes	No	No	No

As nouns, caterpillar track and caterpillar tread are synonyms defined as:

caterpillar track and caterpillar tread: an endless metal belt on which tracked vehicles move over the ground

Other synonyms of caterpillar track include track.

caterpillar track (noun)	caterpillar tread (noun)
an endless metal belt on which tracked vehicles move over the ground	an endless metal belt on which tracked vehicles move over the ground