bends vs sickness

bends and sickness both are nouns.

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

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

bends: pain resulting from rapid change in pressure
sickness: impairment of normal physiological function affecting part or all of an organism

Other hypernyms of bends include illness, malady, unwellness.

bends (noun)	sickness (noun)
pain resulting from rapid change in pressure	impairment of normal physiological function affecting part or all of an organism
	the state that precedes vomiting
	defectiveness or unsoundness