Stretch adverbs are provided in this article. The words listed here are commonly found along with the verb stretch in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb STRETCH.
easily, endlessly
gently, really
scarcely, simply
slowly, usually
Hope this word list had the stretch adverb you were looking for. In addition to adverbs used with stretch, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.