When looking for alternative words for the phrase "possess oneself of," there are a number of options that can be utilized. Some synonyms that may be appropriate in certain situations include obtain, acquire, procure, secure, take hold of, lay hold of, grasp, grab, seize, and claim. Each of these words can be used to describe a similar action to "possess oneself of," but may have nuances that make them more or less appropriate depending on the context. For example, "obtain" may be a more formal or legal term, while "seize" could be more forceful or aggressive. It's important to consider these subtleties when choosing the right synonym for the situation at hand.