wild cotton vs cotton

wild cotton and cotton both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild cotton	Yes	No	No	No
cotton	Yes	No	Yes	No

As nouns, cotton is a hypernym of wild cotton; that is, cotton is a word with a broader meaning than wild cotton:

wild cotton: shrub of southern Arizona and Mexico
cotton: erect bushy mallow plant or small tree bearing bolls containing seeds with many long hairy fibers

Other hypernyms of wild cotton include cotton plant.

wild cotton (noun)	cotton (noun)
shrub of southern Arizona and Mexico	fabric woven from cotton fibers
	thread made of cotton fibers
	erect bushy mallow plant or small tree bearing bolls containing seeds with many long hairy fibers
	soft silky fibers from cotton plants in their raw state

wild cotton (verb)	cotton (verb)
	take a liking to