The Collaborative International Dictionary
Thornless \Thorn"less\, a. Destitute of, or free from, thorns.
Wiktionary
a. Without thorns.
WordNet
adj. having no thorns
Usage examples of "thornless".
Has grown and grown, and with her mellow shade Has blanched my thornless thoughts to her own hue, And even now is budding into blossom, Which never shall bear fruit, but inward still Resorb its vital nectar, self-contained, And leave no living copies of its beauty To after ages.
It is a quaint and lovely mountain town, of tenderly preserved Spanish Colonial architecture, cobbled streets, perpetual springtime, thornless roses and stingless bees, crystalline air, hummingbirds, butterflies and flowers, flowers everywhere.
And yet I cannot, I have to clear away many dull weeds, and tread down many noxious nettles, before I can reach the one fresh and thornless rose, that bloomed for a short space upon my heart, and the fragrance of which so intoxicated my senses, that, for a time, I was under a blessed delusion of believing myself happy.