Basa
- BASA Film
- BASA-press
- Bahasa
- Barrow Arts and Sciences Academy
- Basa (cicada)
- Basa (fish)
- Basa (surname)
- Basa Air Base
- Basa River
- Basa languages
- Basa, Nepal
- Basa, Sudan
- Basaa language
- Basingas
- Bassa (disambiguation)
- Bassa people (Cameroon)
- Bilateral Aviation Safety Agreement
- Black and Asian Studies Association
- British Atomic Scientists Association