kyphosis vs ungainliness

kyphosis and ungainliness both are nouns.

Word	Noun	Adjective	Verb	Adverb
kyphosis	Yes	No	No	No
ungainliness	Yes	No	No	No

As nouns, ungainliness is a hypernym of kyphosis; that is, ungainliness is a word with a broader meaning than kyphosis:

kyphosis: The property of having an abnormal convex curvature in the cervical or lumbar regions of the spine.
ungainliness: the carriage of someone whose movements and posture are extremely ungainly and inelegant

Other hypernyms of kyphosis include gawkiness.

kyphosis (noun)	ungainliness (noun)
The property of having an abnormal convex curvature in the cervical or lumbar regions of the spine.	the carriage of someone whose movements and posture are extremely ungainly and inelegant
an abnormal backward curve to the vertebral column