We don't have synonyms for set-to yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are set to.
"...we two had never had a serious quarrel, though I had had many a set-to with other lads, and had twice over given Bob Chowne black eyes. -- George Manville Fenn, "Devon Boys", 1887"
"...we two had never had a serious quarrel, though I had had many a set-to with other lads, and had twice over given Bob Chowne black eyes. -- George Manville Fenn, "Devon Boys", 1887"