rois·ter 
(roistər)
(roistər)intr.v. rois·tered, rois·ter·ing, rois·ters
1. To engage in boisterous merrymaking; revel noisily.
2. To behave in a blustering manner; swagger.
[From obsolete roister, roisterer, probably from Old French rustre, ruffian, alteration of ruste, from Latin rūsticus, rustic; see RUSTIC.]
roister·er n.
roister·ous adj.
roister·ous·ly adv.
- ostentation
- ostentatious
- ostentatiously
- osteo-
- osteoarthritic
- osteoarthritis
- osteoblast
- osteoblastic
- osteocalcin
- osteoclasis
- osteoclast
- osteoclastic
- osteocyte
- osteogenesis
- osteogenesis imperfecta
- osteogenetic
- osteogenic
- osteogenic sarcoma
- osteogenous
- osteoid
- osteological
- osteologically
- osteologist
- osteology
- osteolysis