Denshi Jisho — Online Japanese dictionary

河 かわ 1: river; stream;
2: (Suffix) the .... river; (suffix used with the names of rivers)
Common word, Noun 
河 がわ the .... river; (suffix used with the names of rivers)
Suffix 
河岸 かし 1: river bank; riverside;
2: fish market
Noun, No-adjective 
河馬 かば hippopotamus (Hippopotamus amphibius)
Noun, Usually written using kana alone 
渡河 とか river crossing
Noun, Suru verb 
河豚 ふく puffer fish; blow fish; fugu; globefish; swellfish
Out-dated or obsolete kana, Noun, Usually written using kana alone 
河豚 ふぐ puffer fish; blow fish; fugu; globefish; swellfish
Noun, Usually written using kana alone 
運河 うんが canal; waterway
Common word, Noun 
河口 かこう mouth of river; estuary
Common word, Noun, No-adjective 
河川 かせん rivers
Common word, Noun 
河畔 かはん riverside
Common word, Noun 
河原 かわら dry river bed; river beach
Common word, Noun 
銀河 ぎんが 1: Milky Way;
2: galaxy
Common word, Noun 
大河 たいが large river
Common word, Noun 
河漢 かかん Milky Way
Noun 
河岸 かがん 1: river bank; riverside;
2: fish market
Noun, No-adjective 
河渠 かきょ waterway; canal; river
Noun 
河魚 かぎょ river fish
Noun 
河系 かけい river system
Noun 
河港 かこう river port
Noun 
河谷 かこく river valley
Expression 
河鹿 かじか kajika frog (Buergeria buergeri)
Noun 
河水 かすい river water; stream
Noun 
河清 かせい clearing of the river water
Noun 
河船 かせん river boat
Noun 
河童 かっぱ 1: kappa (mythical water-dwelling creatures);
2: excellent swimmer;
3: cucumber;
4: (Abbreviation) rolled sushi containing a stick of cucumber
Noun 

Found 176 words. Page one, two, three, four, five, six, seven

You can also

Look up kanji details for *河*.

Try a Yahoo Jisho search for *河* .
Try a Goo Jisho search for *河* .
Try a Google search for *河* .