Denshi Jisho — Online Japanese dictionary

うし 1: cattle; cow; ox; oxen;
2: beef
Common word, Noun 
尾魚 こち flathead (esp. the bartailed flathead, Platycephalus indicus)
Noun, Usually written using kana alone 
ぎゅう 1: cattle; cow; ox; oxen;
2: beef;
3: Chinese "Ox" constellation (one of the 28 mansions)
Noun 
うしや 1: cowshed;
2: cow farmer;
3: restaurant specializing in beef dishes;
4: store (butcher, etc.) that sells beef
Noun 
ごおう Oriental bezoar
Noun 
ごぼう great burdock (Arctium lappa)
Noun, Usually written using kana alone 
ごんぼ great burdock (Arctium lappa)
Noun, Usually written using kana alone 
ぎゅうほ snail's pace; slow progress
Common word, Noun 
うしあぶ Tabanus trigonus (species of horsefly)
Noun, Usually written using kana alone 
うしざめ bull shark (Carcharhinus leucas)
Noun, Usually written using kana alone 
うしばえ ox warble fly (Hypoderma bovis)
Noun, Usually written using kana alone 
うしへん kanji "cow" radical at left
Noun 
ぎっしゃ ox carriage (for Heian era nobles); oxcart
Noun 
ぎゅうご rump of cattle
Noun 
ぎゅうし beef tallow
Noun 
ぎゅうじ ears of an ox
Noun 
ぎゅうば horses and cattle
Noun 
ぎゅうひ cowhide; oxhide
Noun 
ぎゅうや 1: cowshed;
2: cow farmer;
3: restaurant specializing in beef dishes;
4: store (butcher, etc.) that sells beef
Noun 
海老 うしえび giant tiger prawn (Penaeus monodon); black tiger prawn
Noun, Usually written using kana alone 
追い うしおい 1: cattle droving;
2: drover; cowpoke; cowpuncher
Noun 
飼い うしかい cattleman; raising cattle
Noun 
小屋 うしごや cow shed; cattle barn
Noun 
頭馬頭 ごずめず horse-headed and ox-headed demons in the Buddhist hell
Noun 
ぎゅうしゃ cow shed; cattle barn
Common word, Noun 
ぎゅうどん rice covered with beef and vegetables
Common word, Noun 
ぎゅうにく beef
Common word, Noun, No-adjective 
宿 いなみぼし Chinese "Ox" constellation (one of the 28 mansions)
Noun 
いのこずち Japanese chaff flower (Achyranthes japonica)
Noun 
うしがえる American bullfrog (Lithobates catesbeianus)
Noun, Usually written using kana alone 
うしぐるま ox carriage (for Heian era nobles); oxcart
Noun 
うしつつき oxpecker
Noun, Usually written using kana alone 
うまふぶき great burdock (Arctium lappa)
Out-dated or obsolete kana, Noun, Usually written using kana alone 
ぎゅうえき cattle plague; rinderpest
Noun 
ぎゅうかく horns
Noun 
ぎゅうかわ cowhide; oxhide
Noun 

Found 72 words. Page one, two

You can also

Look up kanji details for 牛.

Try a Yahoo Jisho search for 牛 .
Try a Goo Jisho search for 牛 .
Try a Google search for 牛 .