【Delightful】 , 【delicious】 , 【delectable】 , 【luscious】 mean extremely pleasing or gratifying to the senses or to aesthetic taste.
【Delightful】 , the least restricted in its application of these words, may refer to anything that affords keen, lively pleasure and stirs the emotions agreeably, whether the direct appeal is to the mind, the heart, or the senses.
【Delicious】 commonly refers to sensuous pleasures, especially those of taste and smell, but may be applied to anything which is so 【delightful】 that one dwells upon it with sensuous gratification.
【Delectable】 in its implications is often indistinguishable from 【delightful】 and especially from 【delicious】 , though it often suggests more refined or discriminating enjoyment.
The term is more often used than either 【delightful】 or 【delicious】 with a humorous or ironical connotation.
【Luscious】 adds to 【delicious】 an implication of richness (as of flavor, fragrance, coloring, or sound). As applied to fruits, it suggests fullness of flavor and rich ripe juiciness.
Like 【delectable】 it may be used humorously or ironically, but it then commonly adds the implication of extravagance, exaggeration, or, more specifically, voluptuousness.