Reacclimate is a word that refers to the process of adapting to a new situation or environment after having been away from it for some time. There are several synonyms that can be used in place of reacclimate, depending on the context of the sentence. Some of these include readjust, reorient, acclimate, re-familiarize, acclimatize and assimilate. For example, after a prolonged trip overseas, a person may need some time to reacclimate to the change of scenery back home. Similarly, a student returning to school after a long break may need some time to readjust to the academic routine. Regardless of the synonym chosen, the meaning remains the same: adapting to something new after a period of separation.