Pepsi Cola vs Pepsi

Pepsi Cola and Pepsi both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pepsi Cola	Yes	No	No	No
Pepsi	Yes	No	No	No

As nouns, Pepsi Cola and Pepsi are synonyms defined as:

Pepsi Cola (noun)	Pepsi (noun)
Pepsi Cola is a trademarked cola	Pepsi Cola is a trademarked cola