- blytheA city in Riverside County, California, United States.
- BlythA town and civil parish with a town council in south-east Northumberland, England (OS grid ref NZ3181).
- blyLikeness; resemblance; look aspect; species; character.
- blitheCasually careless or indifferent; showing a lack of concern; nonchalant.
- BlithedaleBlithedale Canyon, a neighborhood in the city of Mill Valley, California, United States.