Some people who are sensitive to wheat can eat baked goods made from spelt flour. Spelt is a grain that's closely related to wheat.
Most bagels and breads are made from wheat flour, but some bakers use spelt, a similar, nutty-flavored grain. The word spelt is as ancient as the grain itself, going back to Proto-Indo-European language and the word spel, meaning "to split or break off," possibly because of the way spelt husks split during threshing. Spelt is also the past tense of spell in British English, while in the United States, people tend to go with spelled, unless they're talking about non-wheat bagels.