aspherical vs aspheric

aspherical and aspheric both are adjectives.

Word	Noun	Adjective	Verb	Adverb
aspherical	No	Yes	No	No
aspheric	No	Yes	No	No

As adjectives, aspherical and aspheric are synonyms defined as:

aspherical and aspheric: varying slightly from a perfectly spherical shape

aspherical (adjective)	aspheric (adjective)
varying slightly from a perfectly spherical shape	varying slightly from a perfectly spherical shape