esthetic vs esthetical

esthetic is a noun but esthetical is not a noun.

Word	Noun	Adjective	Verb	Adverb
esthetic	Yes	Yes	No	No
esthetical	No	Yes	No	No

As adjectives, esthetic and esthetical are synonyms defined as:

esthetic and esthetical: concerning or characterized by an appreciation of beauty or good taste

Other synonyms of esthetic include aesthetic, aesthetical.

esthetic (noun)	esthetical (noun)
(philosophy) a philosophical theory as to what is beautiful

esthetic (adjective)	esthetical (adjective)
concerning or characterized by an appreciation of beauty or good taste	concerning or characterized by an appreciation of beauty or good taste
relating to or dealing with the subject of aesthetics
aesthetically pleasing