prone float vs natation

prone float and natation both are nouns.

Word	Noun	Adjective	Verb	Adverb
prone float	Yes	No	No	No
natation	Yes	No	No	No

As nouns, natation is a hypernym of prone float; that is, natation is a word with a broader meaning than prone float:

prone float: a floating position with the face down and arms stretched forward
natation: the act of someone who floats on the water

Other hypernyms of prone float include floating.

prone float (noun)	natation (noun)
a floating position with the face down and arms stretched forward	the act of someone who floats on the water