Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. sūbĕrīnus, a, um, adj. [suber], of the cork-tree, cork- (syn. subereus): cortices, Sid. Ep. 2, 2 med.
2. Sūbĕrīnus, i, m. [1. suberinus], a Roman surname, Plin. Ep. 6, 33, 6.