Festering rhymes with:
pestering, sequestering, administering, blistering, blustering, bolstering, clustering, filibustering, flustering, fostering, mastering, mustering, pestering, plastering, registering, sequestering
pestering, sequestering, administering, blistering, blustering, bolstering, clustering, filibustering, flustering, fostering, mastering, mustering, pestering, plastering, registering, sequestering