"A stranger to" is a common phrase used to describe someone who is unfamiliar or unaccustomed to a particular situation or experience. However, there are several synonyms for this phrase that can convey a similar meaning. These include "unfamiliar with," "unacquainted with," "inexperienced with," "ignorant of," and "unaccustomed to." Each of these phrases implies a lack of familiarity or knowledge about a certain subject or circumstance. Whether used in writing or conversation, using these synonyms can help to add variety and nuance to your language and better convey your intended meaning.