Open English Wordnet
Nouns
(n)Jacob's ladder, Greek valerian, charity, Polemonium caeruleum, Polemonium van-bruntiae, Polymonium caeruleum van-bruntiaepinnate-leaved European perennial having bright blue or white flowers
(n)Jacob's ladder, jack ladder, pilot ladder(nautical) a hanging ladder of ropes or chains supporting wooden or metal rungs or steps