Denshi Jisho — Online Japanese dictionary

1: department; section;
2: (taxonomical) family
Common word, Noun, Noun suffix 
しな 1: article; item; thing; goods; stock;
2: quality;
3: (Usually written using kana alone) flirtatiousness; coquetry
Noun 
とが 1: (Usually written using kana alone) error; mistake; fault;
2: (Usually written using kana alone) sin; wrongdoing; offense
Noun 
いか medical science; medical department
Common word, Noun 
げか surgical department
Common word, Noun, No-adjective 
しか dentistry
Common word, Noun 
りか science
Common word, Noun, No-adjective 
あか subfamily
Noun 
かす to inflict; to impose (a fine, etc.)
Godan verb with su ending 
よか preparatory course; preparatory department
Noun 
かがく science
Common word, Noun 
かもく (school) subject; curriculum; course
Common word, Noun 
がっか study subject; course of study
Common word, Noun 
がんか ophthalmology
Common word, Noun, No-adjective 
こうか engineering course
Common word, Noun 
さんか obstetrics
Common word, Noun, No-adjective 
ないか 1: internal medicine, i.e. treatment by medical procedures rather than surgical procedures;
2: department of internal medicine (hospital, etc.)
Common word, Noun, No-adjective 
ぶんか 1: literary course;
2: the arts
Common word, Noun 
いねか Poaceae (grass family of plants); Gramineae
Noun 
うりか Cucurbitaceae; gourd family
Noun 
かきょ Chinese higher civil service examinations
Noun, Archaism 
かはく speech; words; one's lines; remarks
Noun 
かばつ punishment; discipline
Noun 
かめい 1: family name; house name;
2: family honour; family honor
Noun 
かもか Anatidae (duck family of birds)
Noun 
きくか Asteraceae, Compositae (plant family); aster family; daisy family; sunflower family
Noun, Usually written using kana alone 
きじか Phasianidae (pheasant family of birds)
Noun 

Found 469 words. Page one, two, three, four, five, six, seven, eight, nine, 10, 11, 12, 13, 14, 15, 16, 17, 18

You can also

Look up kanji details for *科*.

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