There are several synonyms for the word "cradler" which refers to a person who cradles or rocks an infant or a young child in their arms. One synonym for this word is "rocking-chair," which is a chair designed to rock back and forth, commonly used by adults to soothe babies. Another synonym is "nursing mother," which refers to a woman who breastfeeds her child and holds them in a cradle position. "Caregiver" is another synonym for "cradler," which is someone who takes care of a child, either as a parent or a professional. Lastly, "babysitter," "childminder," or "nanny" can also be considered as synonyms for "cradler," as they all involve caring for children and holding them.