Amish

Part of speech: noun (n.)

The Amish Mennonites.

Part of speech: adjective (a.)

Of, pertaining to, or designating, the followers of Jacob Amman, a strict Mennonite of the 17th century, who even proscribed the use of buttons and shaving as "worldly conformity". There are several branches of Amish Mennonites in the United States.