Justifies adverbs are provided in this article. The words listed here are commonly found along with the verb justifies in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb JUSTIFIES.
abundantly, amply
certainly, clearly
completely, entirely
fully, hardly
really, scarcely
sufficiently
Hope this word list had the justifies adverb you were looking for. In addition to adverbs used with justifies, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.