You all are right and I put out some bad info, there is a thrornless honey locust,Gleditsia triacanthos inermis, my mistake.
Botanic Name Gleditsia triacanthos L. Synonym The genus name has also been ... of wild trees usually bear branching thorns, but a thornless form (f . inermis Schneid.) ... Honeylocust has strong and durable wood of specific gravity 0.70- 0.80.
Pretty high specific gravity, should make a good bow.