aspect vs facial expression

aspect and facial expression both are nouns.

Word	Noun	Adjective	Verb	Adverb
aspect	Yes	No	No	No
facial expression	Yes	No	No	No

As nouns, aspect and facial expression are synonyms defined as:

Other synonyms of aspect include expression, face, look.

aspect (noun)	facial expression (noun)
the feelings expressed on a person's face	the feelings expressed on a person's face
a characteristic to be considered	a gesture executed with the facial muscles
a distinct feature or element in a problem
the visual percept of a region
the beginning or duration or completion or repetition of the action of a verb