Compounds of 研

• 学研
  (n) study and research
  scholarship and research
• 癌研
  (n) Cancer Research Institute
• 技研
  (n) technical research institute
• 研き
  (n) polish
  improvement
  burnishing
• 研ぎ
  (n) polish
  grinding
  sharpening
• 研く
  (v5k,vt) (1) to polish
  to shine
  to brush (e.g. teeth)
  (2) to refine
  to improve
• 研ぐ
  (v5g,vt) (1) to sharpen
  to hone
  to whet
  to grind
  (2) to wash (rice)
  (3) to scour
  to polish
  to burnish
  (P)
• 研学
  (n,vs) study
• 研究
  (n,vs) study
  research
  investigation
  (P)
• 研削
  (n,vs) grinding
• 研修
  (n,vs) training (esp. in-service)
  induction course
  (P)
• 研摩
  (iK) (n,vs,adj-no) grinding
  polishing
  studying
• 研磨
  (n,vs,adj-no) grinding
  polishing
  studying
  (P)
• 研鑽
  (n,vs) study
  devoting oneself to one's studies
• 研鑚
  (n,vs) study
  devoting oneself to one's studies
• 総研
  (n) general research
  total research
• 通研
  (n) laboratory
• 漫研
  (n) (1) (abbr) society for the study of manga
  (2) manga club
• 薬研
  (n) druggist's mortar
• 予研
  (n) (abbr) National Institute of Health
• 医科研
  (n) Institute for Medical Sciences
• 宇宙研
  (n) space research
• 科捜研
  (n) (abbr) forensic researcher
  crime scene investigator
• 研ぎ師
  (n) sharpener (of swords) and polisher (of mirrors)
• 研ぎ石
  (n) knife sharpener
  whetstone
• 研ぎ物
  (n) sharpening
• 研究員
  (n) researcher
  (P)
• 研究家
  (n) researcher
  student (of)
  (P)
• 研究科
  (n) (post)graduate course
• 研究会
  (n) (1) research society
  (2) study class (e.g. religious)