big wheel vs big enchilada

big wheel and big enchilada both are nouns.

Word	Noun	Adjective	Verb	Adverb
big wheel	Yes	No	No	No
big enchilada	Yes	No	No	No

As nouns, big wheel and big enchilada are synonyms defined as:

Other synonyms of big wheel include big cheese, big deal, big fish, big gun, big shot, head honcho.

big wheel (noun)	big enchilada (noun)
an important influential person	an important influential person