genus /jēˈnəs or jenˈəs/

1. A taxonomic group of lower rank than a family, consisting of closely related species, in extreme cases of one species only (biology)
2. A class of objects comprehending several subordinate species (logic)

• old Europe
• olde-worlde
• old face
• oldfangled
• old fart
• old farts
• old-fashioned
• old-fashioned look
• old-fashionedness
• old fellow
• old fogey
• old-fogeyish
• old fogeys
• old fogy
• old-fogyish
• Old French
• old fruit
• old fustic
• old gang
• old-gentlemanly
• old girl
• Old Glory
• old gold
• old-growth
• old guard