Cases of word usage

1) an obstacle built across a river to store water for irrigation (barrage)

2) an instance of swimming etc in the sea, a river (bathe)

3) a large waterfall or fast, narrow part of a river (cataract)

4) a kind of large river reptile with a long body and mouth (crocodile)

5) a place in a criminal court for the prisoner; a place in a harbour, river etc where ships are (un)loaded or repaired (dock)

6) a (usually long) mouth of a river into which the tide flows (estuary)

7) (especially in Scotland) a river estuary or sea inlet (firth)

8) a flowing movement; to move along or over as a river does (flow)

9) (to cross a river using) a shallow place where it is possible to walk or drive across (ford)

10) a kind of large, African river animal with a thick skin (hippopotamus)