tract vs urinary tract

tract and urinary tract both are nouns.

Word	Noun	Adjective	Verb	Adverb
tract	Yes	No	No	No
urinary tract	Yes	No	No	No

As nouns, urinary tract is a hyponym of tract; that is, urinary tract is a word with a more specific, narrower meaning than tract:

tract: a system of body parts that together serve some particular purpose
urinary tract: the organs and tubes involved in the production and excretion of urine

Other hyponyms of tract include airway, respiratory tract.

tract (noun)	urinary tract (noun)
a bundle of myelinated nerve fibers following a path through the brain	the organs and tubes involved in the production and excretion of urine
a system of body parts that together serve some particular purpose
a brief treatise on a subject of interest; published in the form of a booklet
an extended area of land