ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

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

鶏魚[isagi] chicken grunt (species of fish, Parapristipoma trilineatum)
一番鶏[ichibandori] first cockcrowing
食火鶏[hikuidori] cassowary (Casuarius spp.)
軍鶏[shamo] game fowl
鶏舎[keisha] poultry house

鶏頭[keitou] silver cock's comb (Celosia argentea, esp. crested cock's comb, Celosia argentea var. cristata)
鶏肉[keiniku] chicken meat
鶏鳴[keimei] cocks-crowing
鶏卵[keiran] hens egg

千羽鶴[senbazuru] (string of) many (traditionally 1000) paper cranes
掃き溜めに鶴[hakidamenitsuru] a jewel in a dunghill
田鶴[tazu] crane (any bird of the family Gruidae, esp. the red-crowned crane, Grus japonensis)
鶴嘴[tsuruhashi] pickaxe
折鶴[orizuru] folded paper crane

鶴首[kakushu] looking forward to
丹頂鶴[tanchouzuru] red-crowned crane
鶴首して待つ[kakushushitematsu] to wait expectantly
鶴科[tsuruka] Gruidae
真名鶴[manazuru] white-naped crane (Grus vipio)