truncation vs lowness

truncation and lowness both are nouns.

Word	Noun	Adjective	Verb	Adverb
truncation	Yes	No	No	No
lowness	Yes	No	No	No

As nouns, lowness is a hypernym of truncation; that is, lowness is a word with a broader meaning than truncation:

truncation (noun)	lowness (noun)
the act of cutting short	the quality of being low; lacking height
the replacement of an edge or solid angle (as in cutting a gemstone) by a plane (especially by a plane that is equally inclined to the adjacent faces)	a low or small degree of any quality (amount or force or temperature etc.)
the property of being truncated or short	a feeling of low spirits
	a position of inferior status; low in station or rank or fortune or estimation