Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
indŏlōrĭus, a, um, adj. [2. in-dolor], painless, Hier. in Eph. 4, 17-19.
Hence, n. plur. as subst.: indŏlōrĭa, = anodyna, anæsthetics, Cael. Aur. Tard. 2, 4, 79; cf. indoloria, ἀνάλγητα, Gloss.