1. Without a basis in reason or fact
   "the allegations proved groundless"
   - baseless, idle, unfounded, unwarranted, wild

See also: unsupported

• Cecil Frank Powell
• Cecil J. Rhodes
• Cecil John Rhodes
• Cecil Rhodes
• Cecil Scott Forester
• cecity
• cecropia
• cecropia moth
• Cecropia peltata
• Cecropiaceae
• cecum
• cedar
• cedar chest
• cedar elm
• cedar mahogany
• cedar nut
• cedar of Goa
• cedar of Lebanon
• Cedar Rapids
• cedar tree
• cedar waxwing
• cedar-apple rust
• cedar-scented
• cedarbird
• cedarn