Possessing adverbs are provided in this article. The words listed here are commonly found along with the verb possessing in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb POSSESSING.
actually, apparently
exactly, merely
naturally, nearly
really
Hope this word list had the possessing adverb you were looking for. In addition to adverbs used with possessing, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.