馴鹿 （トナカイ） reindeer (Rangifer tarandus)

順化 （ジュンカ） acclimatization, naturalization, acclimation

雅馴 （ガジュン） refined (prose, etc.)

慣れる （なれる） to get used to, to grow accustomed to, to become familiar with, to become skilled in, to become experienced at, to become tame, to become domesticated, to get used to doing

慣らす （ならす） to accustom, to train (e.g. one's ear), to tame, to domesticate, to train (an animal)