- Proto-Mon-Khmer: *kpaas (Shorto, 2006, #1915)
Munda cognates include Juang kapas, Korwa kapaːs, Korku kapuso, Bondo kapa, Gata' kopa.
Compare Sanskrit कर्पास (karpāsa) and Old Chinese 布 (OC *pˤa-s) (B-S), both of which are probably Austroasiatic loans.
*kpaas
- cotton
- Proto-Aslian:
- Proto-Bahnaric: *kpaːs (Sidwell, 2011)
- Central: *kpaːs
- Tariang: paːs
- South-Central:
- Bahnar: kơpaih
- Tampuan: kapaas
- South: *paːs
- North: *kpaːs
- Halang: kơpaih
- Jeh: kwah
- Sedang: kəpɛj
- Proto-Katuic: *kpaas (Sidwell, 2005)
- Katu:
- Dakkang: kapaaç
- Kantu: kapaas
- Triw: kapaajh
- Eastern Katu: k'paih
- Western Katu: kǝpaːjh
- Pacoh: capaih
- Ta'Oihic:
- Ngeq: kapaajh
- Ong: kpaa̰jh
- Ta'Oi: kapaajh
- West Katuic:
- Khasic: *knpaat (Sidwell, 2012)
- Khmeric:
- Old Khmer: ʼaṃpas (prefixed form of *pas) (?)
- Proto-Palaungic:
- Proto-Pearic:
- Proto-Vietic: *k-paːs (Ferlus, 2007)
- Chứt:
- Arem: kupɐːlʔ
- Maleng: kəpaːj⁵
- Rục-Sách:
- Rục: kupaːl⁶
- Sách: kupaːl⁶
- Thavung: kəpajʰ¹
- Tho: paːl⁵
- Pong: *kpaːj¹
- Viet-Muong:
- Muong: pái
- Middle Vietnamese: ꞗải