ランゲルハンス島[rangeruhansutou] islets of Langerhans
群島[guntou] island group
孤島[kotou] solitary island
広島県[hiroshimaken] Hiroshima prefecture (Chuugoku area)
鹿児島県[kagoshimaken] Kagoshima prefecture (Kyushu)

諸島[shotou] archipelago
小島[kojima] small island
千島[chishima] Kurile Islands
全島[zentou] the whole island
多島海[tatoukai] archipelago

ストックホルム症候群[sutokkuhorumushoukougun] Stockholm syndrome
亜群[agun] subgroup
一群[ichigun] group
一群れ[hitomure] group
可換群[kakangun] Abelian group

魚群[gyogun] school of fish
繰込み群[kurikomigun] renormalisation group (physics)
群がる[muragaru] to swarm
群れ[mure] group