Harborer is a word that refers to a person who provides shelter or refuge to someone who is in need. There are several synonyms for the word harborer, which include protector, defender, guardian, shelterer, and custodian. These words all imply the idea of safeguarding or providing a haven for someone in need. Other related synonyms for harborer include caretaker, steward, and guardian. Each of these words carries a subtle nuance of responsibility for the well-being of another person, animal, or thing. Ultimately, a harborer is someone who takes on the role of providing security, protection, and safety to those who need it the most.