Sentimentalism.
Excessively sweet in action or disposition, especially if romantic or sentimental to the point of ridiculousness; sickly sweet, syrupy.
Resembling granulated sugar; saccharoid.
Of or relating to saccharin (“a white, crystalline powder, C₇H₅NO₃S, used as an artificial sweetener in food products”).
A term of endearment; sweetheart.
The younger recipient (usually female or a bottom) of interest from a sugar daddy or sugar mama, especially financial and romantic in an intergenerational relationship