The phrase "in the keeping of" can be replaced by other synonyms that convey similar meanings. Some alternatives include "under the custody of," "in the possession of," or "under the care of." Each phrase suggests that someone or something is responsible for looking after or safeguarding a particular item or person. For example, a valuable artifact could be said to be "under the custody of" a museum, while a child might be "in the care of" a babysitter. The context of the situation will often determine which synonym to use, but all of them convey a sense of responsibility and protection.