Lewis & Short

2. ŏpertus, ūs, m. [operio], a covering (post-class.), App. Mag. p. 310, 15; Macr. S. 7, 9, 26.

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• ŏpĕrōsĭtas
• ŏpĕrōsus
• ŏpĕrōsē
• ŏpertānĕus
• ŏpertē
• ŏpertĭo
• ŏperto
• ŏpertōrĭum
• ŏpertum
• ŏpertus
• ŏpertus
• ŏpĕrūla
• ŏpes
• opetis
• Ophellĭus
• Ŏpheltes
• ŏphĕostăphylē
• Ŏphĭăca
• Ōphĭăs
• ŏphĭcardēlos
• ŏphĭcardēlus
• ...