Acclimatization :: Acclimatization (n.) The act of acclimatizing; the process of inuring to a new climate, or the state of being so inured..
Acclimatize :: Acclimatize (v. t.) To inure or habituate to a climate different from that which is natural; to adapt to the peculiarities of a foreign or strange climate; said of man, the inferior animals, or plants..