"Leave alone" is a common phrase that refers to letting someone or something remain undisturbed. However, there are several synonyms that can be used to convey a similar meaning such as "ignore," "let be," "abstain," "relinquish," "forbear," "avoid," "refrain from," "spare," "forgo," and "cede." These synonyms can be used to indicate a desire to maintain a distance and respect boundaries, oftentimes in relationships or interactions with others. In certain contexts, using one of these synonyms may be preferred to using the phrasal verb "leave alone" as it may be perceived as more formal or professional.