caisson disease vs unwellness

caisson disease and unwellness both are nouns.

Word	Noun	Adjective	Verb	Adverb
caisson disease	Yes	No	No	No
unwellness	Yes	No	No	No

As nouns, unwellness is a hypernym of caisson disease; that is, unwellness is a word with a broader meaning than caisson disease:

caisson disease: pain resulting from rapid change in pressure
unwellness: impairment of normal physiological function affecting part or all of an organism

Other hypernyms of caisson disease include illness, malady, sickness.

caisson disease (noun)	unwellness (noun)
pain resulting from rapid change in pressure	impairment of normal physiological function affecting part or all of an organism