The word "haddest in keeping" refers to the act of possessing or keeping something. There are several synonyms for this phrase that can be used interchangeably. For example, one can say "held in possession," "retained," "maintained," "stored," or "preserved." Each of these synonyms conveys the same meaning as having something in one's possession. Additionally, the phrase "had in one's possession" can also be used as a synonym for "haddest in keeping." No matter which synonym is used, each conveys the idea of ownership or control over something, which is crucial in both personal and professional contexts.