科

also 品

1. noun, esp. 品 article; item; thing; goods; stock
2. quality
3. usually in kana, esp. 科 flirtatiousness; coquetry

か

1. noun, suffix department (of a university or hospital)
2. course (of study); branch of study; specialization
3. biology family

とが also 咎

1. noun, usually in kana error; mistake; fault
2. usually in kana sin; wrongdoing; offense

1. noun, usually in kana Japanese linden (Tilia japonica)