superficiality vs shallowness

superficiality and shallowness both are nouns.

Word	Noun	Adjective	Verb	Adverb
superficiality	Yes	No	No	No
shallowness	Yes	No	No	No

As nouns, superficiality and shallowness are synonyms defined as:

superficiality and shallowness: lack of depth of knowledge or thought or feeling

As nouns, shallowness is a hypernym of superficiality; that is, shallowness is a word with a broader meaning than superficiality:

superficiality: shallowness in terms of affecting only surface layers of something
shallowness: the quality of lacking physical depth

superficiality (noun)	shallowness (noun)
lack of depth of knowledge or thought or feeling	the quality of lacking physical depth
shallowness in terms of affecting only surface layers of something	lack of depth of knowledge or thought or feeling