'river'はこちらの項目にも見つかりました。
英語の見出し語に対する説明:
alluvium
- Amazon
- Amazonian
- aweigh
- bank
- base level
- bayou
- bed
- bend
- bending
- billabong
- blue catfish
- branch
- bridge
- Congo
- crossing
- curve
- Danube
- delta
- Dordogne
- downstream
- dredge up
- driftwood
- drive
- estuary
- ferryboat
- flood
- floodplain
- fluvial
- ford
- fordable
- fork
- Ganges
- ghat
- head
- high-water mark
- hippopotamus
- Jordan
- Lethe
- logjam
- meander
- midstream
- Mississippi
- Missouri
- mouth
- mudlark
- narrow
- navigable river
- Niger
- Nile