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

鳥竜茶[uuroncha] oolong tea
愛鳥[aichou] pet bird
鳥渡[choto] just a minute
一石二鳥[issekinichou] killing two birds with one stone
益鳥[ekichou] beneficial bird

黄鳥[kouchou] Japanese bush warbler (Cettia diphone)
伽藍鳥[garanchou] pelican
火食鳥[hikuidori] cassowary (Casuarius spp.)
花鳥[kachou] flowers and birds
花鳥風月[kachoufuugetsu] beauties of nature