lowliness vs smallness

lowliness and smallness both are nouns.

Word	Noun	Adjective	Verb	Adverb
lowliness	Yes	No	No	No
smallness	Yes	No	No	No

As nouns, smallness is a hyponym of lowliness; that is, smallness is a word with a more specific, narrower meaning than lowliness:

lowliness: a position of inferior status; low in station or rank or fortune or estimation
smallness: The quality of being minor in influence, power, or rank.

Other hyponyms of lowliness include inferiority, lower rank, lower status.

lowliness (noun)	smallness (noun)
a position of inferior status; low in station or rank or fortune or estimation	the property of having a relatively small size
the state of being humble and unimportant	lack of generosity in trifling matters
	the property of being a relatively small amount
	the property of having relatively little strength or vigor
	The quality of being minor in influence, power, or rank.