When it comes to finding synonyms for the word "accustomed," there are a variety of options to choose from. One common alternative is "familiar," which conveys a sense of comfort and ease with a particular situation or activity. Other synonyms include "used to," "adapted," "habituated," and "acclimatized." Each of these words implies a level of familiarity or comfort with a routine or habit, and can be used to describe everything from an individual's daily routine to their response to a particular type of weather or environment. Ultimately, the best synonym for "accustomed" depends on the context in which it is being used and the specific nuances of the situation it describes.