symmetrical vs harmonious

symmetrical and harmonious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
symmetrical	No	Yes	No	No
harmonious	No	Yes	No	No

As adjectives, symmetrical and harmonious are synonyms defined as:

symmetrical and harmonious: exhibiting equivalence or correspondence among constituents of an entity or between different entities

Other synonyms of symmetrical include proportionate.

symmetrical (adjective)	harmonious (adjective)
having similarity in size, shape, and relative position of corresponding parts	musically pleasing
exhibiting equivalence or correspondence among constituents of an entity or between different entities	exhibiting equivalence or correspondence among constituents of an entity or between different entities
	existing together in harmony
	suitable and fitting