There are 13 words that start with 'chalc'.
| chalcid | chalcids | 
| chalcogen | chalcedony | 
| chalcocite | chalcogens | 
| chalcedonic | chalcocites | 
| chalcedonies | chalcogenide | 
| chalcopyrite | chalcogenides | 
| chalcopyrites | |
Note: These 13 words that start with 'chalc' are found from the USA & Canada version of the tournament Scrabble word list.