1. Having spines
   "the dorsal fin is spinous"
   - spiny 
2. Shaped like a spine or thorn
   - acanthoid, acanthous

See also: pointed, spine

Antonym: spineless

• forever
• forever and a day
• forevermore
• forewarn
• forewarning
• forewing
• forewoman
• foreword
• forex
• foreyard
• forfeit
• forfeited
• forfeiture
• forfend
• forficate
• Forficula
• Forficula auricularia
• Forficulidae
• forgather
• forge
• forged
• forger
• forgery
• forget
• forget me drug