There are 21 7-letter words that start with 'arc'.
| arcaded | arcades | arcadia | arcanum |
| archaea | archaic | archean | archers |
| archery | archfoe | archils | archine |
| arching | archive | archons | archway |
| arcking | arcsine | arctics | arcuate |
| arcuses | |||
Note: These 21 7-letter words that start with 'arc' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with arch, arca, arcu, arct, arcs, arcc, arci, arck, arce, arco.
4-letter words start with 'arc' (3)