Here is a list of nouns that start with ARC.
arc, arcade, arch, archaeology, archaism
archbishop, archdiocese, archenemy, archery, archfool
archipelago, architect, architecture, archtype
Hope you enjoy this page of nouns that start with arc and the rest of this noun list a-z site as well.
Help make this a better resource by adding more nouns in the comments section. Thanks.