wateriness vs scantness

wateriness and scantness both are nouns.

Word	Noun	Adjective	Verb	Adverb
wateriness	Yes	No	No	No
scantness	Yes	No	No	No

As nouns, scantness is a hypernym of wateriness; that is, scantness is a word with a broader meaning than wateriness:

wateriness: meagerness or poorness connoted by a superfluity of water (in a literary style as well as in a food)
scantness: the quality of being meager

Other hypernyms of wateriness include exiguity, leanness, meagerness, meagreness, poorness, scantiness.

wateriness (noun)	scantness (noun)
the property of resembling the viscosity of water	the quality of being meager
meagerness or poorness connoted by a superfluity of water (in a literary style as well as in a food)
the wetness of ground that is covered or soaked with water