Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
pŏpŭlōsus, a, um, adj. [1. populus], abounding in people, populous, numerous (post-class.): gens populosa, App. Flor. p. 342: familia, id. M. 5, p. 162: Briareus populoso corpore, Sid. Carm. 15, 27.
Comp.: populosior globus, Veg.Mil. 3, 19 fin.
Sup.: insula populosissima, Sol. 52.