sweet vs sugariness

sweet and sugariness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet	Yes	Yes	No	Yes
sugariness	Yes	No	No	No

As nouns, sugariness is a hyponym of sweet; that is, sugariness is a word with a more specific, narrower meaning than sweet:

Other hyponyms of sweet include saccharinity.

As nouns, sweet and sugariness are synonyms defined as:

sweet and sugariness: the taste experience when sugar dissolves in the mouth

Other synonyms of sweet include sweetness.

sweet (noun)	sugariness (noun)
the property of tasting as if it contains sugar	the sweetness of sugar
the taste experience when sugar dissolves in the mouth	the taste experience when sugar dissolves in the mouth
a food rich in sugar
a dish served as the last course of a meal

sweet (adjective)	sugariness (adjective)
not containing or composed of salt water
(used of wines) having a high residual sugar content
having or denoting the characteristic taste of sugar
having a natural fragrance
having a sweet nature befitting an angel or cherub
pleasing to the ear
with sweetening added
not soured or preserved
pleasing to the mind or feeling
pleasing to the senses

sweet (adverb)	sugariness (adverb)
in an affectionate or loving manner (`sweet' is sometimes a poetic or informal variant of `sweetly')