As well as Irish, Ó Bruadair knew Latin and English. He was a poet of considerable range, and wrote on historical and political subjects, as well as producing elegies on a number of his patrons, bitter satires on Cromwellian planters, religious poems of real feeling and, almost uniquely amongst Gaelic poets, at least two epithalamia. His versification was equally varied, and he wrote in both syllabic and assonantal metres.