鉄兜[tetsukabuto] steel helmet
兜虫[kabutomushi] rhinoceros beetle (esp. the Japanese rhinoceros beetle, Trypoxylus dichotomus)
内兜[uchikabuto] inside of a helmet
兜蟹[kabutogani] horseshoe crab
鳥兜[torikabuto] aconite (esp. species Aconitum japonicum)

兜頭巾[kabutozukin] helmet-shaped hood
兜率天[tosotsuten] Tusita heaven
勝って兜の緒を締めよ[kattekabutonoowoshimeyo] don't let your guard down even after a victory
角兜[tsunokabuto] spiked helmet

蟹座[kaniza] Cancer (constellation)
弁慶蟹[benkeigani] grapsoid (anim)
毛蟹[kegani] hair crab (Erimacrus isenbeckii)
蟹股[ganimata] bowlegged
沢蟹[sawagani] Japanese freshwater crab (Geothelphusa dehaani)

甲蟹[kabutogani] horseshoe crab
蟹工船[kanikousen] crab-canning boat
蟹玉[kanitama] Chinese dish with fried egg and crab
蟹缶[kanikan] canned crab