instability vs disequilibrium

instability and disequilibrium both are nouns.

Word	Noun	Adjective	Verb	Adverb
instability	Yes	No	No	No
disequilibrium	Yes	No	No	No

As nouns, disequilibrium is a hypernym of instability; that is, disequilibrium is a word with a broader meaning than instability:

instability: a lack of balance or state of disequilibrium
disequilibrium: loss of equilibrium attributable to an unstable situation in which some forces outweigh others

instability (noun)	disequilibrium (noun)
the quality or attribute of being unstable and irresolute	loss of equilibrium attributable to an unstable situation in which some forces outweigh others
unreliability attributable to being unstable
an unstable order
a lack of balance or state of disequilibrium