1. Intellectually productive
   "a prolific writer"
   - fecund, fertile 
2. Bearing in abundance especially offspring
   "flying foxes are extremely prolific"; "a prolific pear tree"
   - fertile

See also: fruitful, productive

• hardheads
• hardhearted
• hardheartedness
• hardihood
• hardily
• hardiness
• Harding
• hardinggrass
• hardish
• hardline
• hardliner
• hardly
• hardly a
• hardness
• hardpan
• hardscrabble
• hardship
• moderatism
• moderato
• moderator
• moderatorship
• modern
• modern ballet
• modern dance
• Modern English