dissymmetry vs disproportion

dissymmetry and disproportion both are nouns.

Word	Noun	Adjective	Verb	Adverb
dissymmetry	Yes	No	No	No
disproportion	Yes	No	No	No

As nouns, dissymmetry and disproportion are synonyms defined as:

dissymmetry and disproportion: lack of proportion; imbalance among the parts of something

Other synonyms of dissymmetry include imbalance.

dissymmetry (noun)	disproportion (noun)
lack of proportion; imbalance among the parts of something	lack of proportion; imbalance among the parts of something