imbalance vs disequilibrium

imbalance and disequilibrium both are nouns.

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

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

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

imbalance (noun)	disequilibrium (noun)
lack of proportion; imbalance among the parts of something	loss of equilibrium attributable to an unstable situation in which some forces outweigh others
a lack of balance or state of disequilibrium