Nouns

(n)kyphosis, humpback, hunchbackan abnormal backward curve to the vertebral column
(n)humpback, hunchback, crookbacka person whose back is hunched because of abnormal curvature of the upper spine
(n)humpback, humpback whale, Megaptera novaeangliaelarge whalebone whale with long flippers noted for arching or humping its back as it dives