Allomother is a term used to describe a non-mother who assists with the care and rearing of a child. There are a few synonyms that could be used in place of allomother, such as co-parent, foster parent, or surrogate mother. These terms all refer to someone who is not the biological parent but takes on a parental role. Another synonym for allomother could be nanny, babysitter, or caregiver, which highlight someone who cares for and looks after a child on a regular basis. Ultimately, allomother is a unique term used within the context of animal behavior and evolutionary biology, but there are several other words that can be used to convey a similar meaning within human society.