Hub of the Universe vs Boston

Hub of the Universe and Boston both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hub of the Universe	Yes	No	No	No
Boston	Yes	No	No	No

As nouns, Hub of the Universe and Boston are synonyms defined as:

Hub of the Universe and Boston: state capital and largest city of Massachusetts; a major center for banking and financial services

Other synonyms of Hub of the Universe include Bean Town, Beantown, capital of Massachusetts.

Hub of the Universe (noun)	Boston (noun)
state capital and largest city of Massachusetts; a major center for banking and financial services	state capital and largest city of Massachusetts; a major center for banking and financial services