discreetness vs discernment

discreetness and discernment both are nouns.

Word	Noun	Adjective	Verb	Adverb
discreetness	Yes	No	No	No
discernment	Yes	No	No	No

As nouns, discernment is a hypernym of discreetness; that is, discernment is a word with a broader meaning than discreetness:

discreetness: knowing how to avoid embarrassment or distress
discernment: the mental ability to understand and discriminate between relations

Other hypernyms of discreetness include judgement, judgment, sagaciousness, sagacity.

discreetness (noun)	discernment (noun)
subtly skillful handling of a situation	the trait of judging wisely and objectively
knowing how to avoid embarrassment or distress	the mental ability to understand and discriminate between relations
	the cognitive condition of someone who understands
	perception of that which is obscure
	delicate discrimination (especially of esthetic values)