cupfulls
Cupful is singular; cupfuls is the plural.
Cupfuls
cupsful
cupfuls
The plural form of cupful is cupfuls.
Mi(s) (Plural with 's')
Cupful's
An old way of saying a cow or ox in plural form
Singular: goose Plural: geese
no it is not it is just another way of saying it in present tense
Both "cupful" and the plural "cupfuls" use only one L, a common short form used in measurements (teaspoonful, etc.).
In the word cupful, cup is the root, and ful is the suffix.