11-Letter Words Containing: I,R,T,I,E,T,H

• relating to or involving arithmetic

• the branch of pure mathematics dealing with the theory of numerical calculations

• frugality in the expenditure of money or resources

• ancient king of Pontus who expanded his kingdom by defeating the Romans but was later driven out by Pompey (132-63 BC)

• needlework on which you are working with needle and thread

• Between ethnic groups, or their members.