A successor in interest refers to an individual or entity that inherits or acquires the right, title, or interest of another person or entity. Synonyms for the term could be assignee, beneficiary, heir, legatee, or transferee. An assignee refers to someone who accepts the transfer of rights, while beneficiaries are individuals entitled to receive benefits from a trust or will. Heirs and legatees are persons who inherit property or assets from a deceased individual. Lastly, a transferee refers to a person or entity who receives assets or property from another, including in the context of a merger or acquisition. These synonyms all have a common thread of someone taking over the rights and interests of someone else, making them an effective substitute.