Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Carsĕŏli, ōrum, m., = Καρσέολοι, a town of the Æqui, in Latium, now the village Carsoli, Liv. 10, 3, 2; 10, 13, 1; 10, 27, 9; 10, 29, 15; Vell. 1, 14, 5; Ov. F. 4, 683.
Hence,