Nouns

(n)overabundance, overmuch, overmuchness, superabundancea quantity that is more than what is appropriate“four-year-olds have an overabundance of energy”

Adjectives

(s)overmuchvery great in quantity; overabundant“showed overmuch affection”

Adverbs

(r)overmuch, too muchmore than necessary“she eats too much”, “let's not blame them overmuch”