お七夜[oshichiya] name-giving ceremony
七つ[nanatsu] seven
七つの海[nanatsunoumi] the seven seas
七屋[nanatsuya] pawnshop
七回忌[shichikaiki] seventh anniversary of a death

七角形[shichikakkei] heptagon
七曲がり[nanamagari] tortuous or spiral (path)
七月[shichigatsu] July
七賢[shichiken] the Seven Wise Men (of Confucius's Analects)

亜種[ashu] subspecies
異機種[ikishu] heterogenous equipment
異種[ishu] different kind (species, variety)
育種[ikushu] (plant) breeding
育種家[ikushuka] (plant) breeder

育種所[ikushujo] (plant) nursery
一種[isshu] species
一粒種[hitotsubudane] an only child
種違い[tanechigai] half-brother
艶種[tsuyadane] love affair

粥腹[kayubara] surviving on rice gruel
七種粥[nanakusagayu] rice gruel containing the seven plants of spring
小豆粥[azukigayu] rice gruel with adzuki beans
茶粥[chagayu] tea gruel
御粥[okayu] thin rice porridge

芋粥[imogayu] rice gruel with diced sweet potatoes
冬至粥[toujigayu] azuki bean rice gruel eaten on the day of the winter solstice (to chase away demons that spread contagious diseases)
十夜粥[juuyagayu] rice gruel served in temples for ten-night memorial services
粥状硬化[jukujoukouka] atherosclerosis