Fecund and its synonyms fruitful and fertile all mean producing or capable of producing offspring or fruit, literally or figuratively. Fecund applies to things that yield offspring, fruit, or results in abundance or with rapidity ("a fecund herd," "a fecund imagination"). Fruitful emphasizes abundance, too, and often adds the implication that the results attained are desirable or useful ("fruitful plains," "a fruitful discussion"). Fertile implies the power to reproduce ("a fertile egg") or the power to assist in reproduction, growth, or development ("fertile soil," "a fertile climate for artists").