US Constitution vs U.S. Constitution

US Constitution and U.S. Constitution both are nouns.

Word	Noun	Adjective	Verb	Adverb
US Constitution	Yes	No	No	No
U.S. Constitution	Yes	No	No	No

As nouns, US Constitution and U.S. Constitution are synonyms defined as:

US Constitution and U.S. Constitution: the constitution written at the Constitutional Convention in Philadelphia in 1787 and subsequently ratified by the original thirteen states

Other synonyms of US Constitution include Constitution, Constitution of the United States, United States Constitution.

US Constitution (noun)	U.S. Constitution (noun)
the constitution written at the Constitutional Convention in Philadelphia in 1787 and subsequently ratified by the original thirteen states	the constitution written at the Constitutional Convention in Philadelphia in 1787 and subsequently ratified by the original thirteen states