tightness vs deficiency

tightness and deficiency both are nouns.

Word	Noun	Adjective	Verb	Adverb
tightness	Yes	No	No	No
deficiency	Yes	No	No	No

As nouns, deficiency is a hypernym of tightness; that is, deficiency is a word with a broader meaning than tightness:

Other hypernyms of tightness include lack, want.

tightness (noun)	deficiency (noun)
lack of movement or room for movement	lack of an adequate quantity or number
extreme stinginess	the state of needing something that is absent or unavailable
the spatial property of being crowded together
a tight feeling in some part of the body
a state occasioned by scarcity of money and a shortage of credit