Habituate (to) means to become accustomed to something through frequent or continual repetition. INURE (5 letters) and ACCUSTOM (8 letters) are two words that can be used to describe this process. INURE is a verb meaning to become hardened or adjusted to something, usually an unpleasant situation, while ACCUSTOM is a verb meaning to become used to something through familiarity or experience. Both words can be used to describe the process of habituating to something.