PEDANTS is a term used to describe people who are overly concerned with details and rules. PURISTS, which has 7 letters, are people who adhere strictly to traditional forms and customs. DIDACTS, also with 7 letters, are people who teach moral lessons or lecture others. HAPLITTERS, with 10 letters, are people who are excessively precise in their use of language. All of these terms can be used to describe pedants, who are overly concerned with details and rules.