The term 'Salon Order' refers to the services provided by a hair salon. The two words that make up this term are 'SET' and 'PERM'. 'SET' is a 3-letter word that refers to the process of styling hair with heated tools such as curling irons, flat irons, or rollers. 'PERM' is a 4-letter word that refers to a chemical treatment used to permanently alter the texture of the hair. This process involves wrapping the hair around rods and applying a chemical solution to break down the hair's natural bonds, allowing it to be reshaped into a desired style.