queasiness vs sickness

queasiness and sickness both are nouns.

Word	Noun	Adjective	Verb	Adverb
queasiness	Yes	No	No	No
sickness	Yes	No	No	No

As nouns, sickness is a hypernym of queasiness; that is, sickness is a word with a broader meaning than queasiness:

Other hypernyms of queasiness include nausea.

queasiness (noun)	sickness (noun)
inability to rest or relax or be still	impairment of normal physiological function affecting part or all of an organism
a mild state of nausea	the state that precedes vomiting
	defectiveness or unsoundness