i Register
In some senses, exulceration is marked as obsolete. Watch for register when choosing this word.
noun
ulceration
1719, John Quincy, Pharmacopœia Officinalis & Extemporanea: Or, a Compleat English Dispensatory, publ. A Bell (2nd ed., very much Improv'd), page 437. […] and thus it is likewiſe of ſervice in choletic Conſtitutions, and where the Shapneſs of Humours threatens Excoriations and Exulcerations.
fretting; festering; soreness
Which exulceration of mind made him apt to take all occaſions of contradiction.