cloying
Meaning: sickeningly sweet
Usage: Though Ronald was physically attractive, Maud found his constant compliments and solicitous remarks cloying.
saccharine
Meaning: sickeningly sweet
Usage: Tom’s saccharine manner, although intended to make him popular, actually repelled his classmates.
mawkish
Meaning: characterized by sick sentimentality
Usage: Although some nineteenth-century critics viewed Dickens’s writing as mawkish, contemporary readers have found great emotional depth in his works.
maudlin
Meaning: weakly sentimental
Usage: Although many people enjoy romantic comedies, I usually find them maudlin and shallow.