Do nudists have a word for people who wear clothes?

Yes, anyone who is not a nudist is called a "textile". The word textile refers to the non-nude person being clothed with textile materials (i.e., cloth is a textile).

As I understand it, textile is not a derogatory word in any way. Nudists are the most accepting groups of people on the planet.  The nudist may even have remorse when using the word.  "Those poor textiles, they do not know what they are missing."

Sometimes, when nudists are not nude, they may call themselves "textile" as in "While at work, I am a textile, but at home I an a nudist."   Or, "When the weather is too chilly to be nude, I am happy to be a warm textile."

Make sense?