Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Nōbĭlĭor, ōris, m. [nobilis], a family name in the gens Fulvia, e. g. M. Fulvius Nobilior, the vanquisher of the Ætolians and the friend of Ennius, Liv. 37, 47; 39, 5; 40, 45.