mature, artificial, practical.
effortless, straightforward
A synonym for temper is temperament.
A synonym for varied is diverse.
I don't think there is a synonym for adjoined it is an antonym.
A synonym of undeniable is nonviable.
Doable.
macabre
Elderly?
effortless, straightforward
Stylish, graceful, tasteful, sophisticated, chic.
cardinal, vermilion, rubicund
excellent, competent, talented
creative, cultured, original, sophisticated, refined, aesthetic, eloquent, discerning
stylish, fine, sophisticated, delicate, handsome, grandeur, refinement, gracefulness
colossal, enormous, extensive, gigantic, paramount, powerful
informed, aware, reasonable, educated, sophisticated, cultivated, open-minded, knowledgeable
deficient, imperfect, incorrect, substandard, immoral, distressing