Nouns

(n)dessert, sweet, aftersa dish served as the last course of a meal
(n)sweet, confectiona food rich in sugar
(n)sweet, sweetness, sugarinessthe taste experience when sugar dissolves in the mouth
(n)sweetness, sweetthe property of tasting as if it contains sugar

Adjectives

(a)sweethaving or denoting the characteristic taste of sugar
(s)angelic, angelical, cherubic, seraphic, sweethaving a sweet nature befitting an angel or cherub“an angelic smile”, “a cherubic face”, “looking so seraphic when he slept”, “a sweet disposition”
(s)dulcet, honeyed, mellifluous, mellisonant, sweetpleasing to the ear“the dulcet tones of the cello”
(s)sweetpleasing to the senses“the sweet song of the lark”, “the sweet face of a child”
(s)gratifying, sweetpleasing to the mind or feeling“sweet revenge”
(s)odoriferous, odorous, perfumed, scented, sweet, sweet-scented, sweet-smellinghaving a natural fragrance“odoriferous spices”, “the odorous air of the orchard”, “the perfumed air of June”, “scented flowers”
(a)sweet(used of wines) having a high residual sugar content“sweet dessert wines”
(a)fresh, sweetnot containing or composed of salt water“fresh water”
(s)fresh, sweet, unfermentednot soured or preserved“sweet milk”
(s)sugared, sweetened, sweet, sweet-flavoredwith sweetening added

Adverbs

(r)sweetly, sweetin an affectionate or loving manner (‘sweet’ is sometimes a poetic or informal variant of ‘sweetly’)“Susan Hayward plays the wife sharply and sweetly”, “how sweet the moonlight sleeps upon this bank” (Shakespeare), “talking sweet to each other”