paper cup vs Dixie cup

paper cup and Dixie cup both are nouns.

Word	Noun	Adjective	Verb	Adverb
paper cup	Yes	No	No	No
Dixie cup	Yes	No	No	No

As nouns, paper cup and Dixie cup are synonyms defined as:

paper cup and Dixie cup: a disposable cup made of paper; for holding drinks

paper cup (noun)	Dixie cup (noun)
a disposable cup made of paper; for holding drinks	a disposable cup made of paper; for holding drinks