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

艶歌[enka] enka
艶かしい[namamekashii] charming
艶めく[tsuyameku] (for an object) to be shiny
艶やか[adeyaka] glamorous
艶事[tsuyagoto] love affair

艶種[tsuyadane] love affair
艶出し[tsuyadashi] burnishing
艶書[ensho] love-letter
艶消し[tsuyakeshi] frosted (glass)