The term "approbating" refers to the act of approving or sanctioning something. There are several synonyms that can be used in place of this term. One such synonym is "endorsing", which denotes the act of giving support or approval to something. "Commending" is another synonym for approbating, which means to express praise or admiration for something. Another good synonym for this word is "acclaiming", which means to publicly praise or give approval to something. Additionally, "ratifying", "sanctioning" and "validating" can all be used as synonyms for approbating, with each word emphasizing a slightly different nuance of the idea of approval.