Usually the form of a word has more letters in it than the singular form. Find a plural word that has fewer letters in it than its singular form.?

MOST plural Words have fewer letters in their singular form!

e.g.

Words / Word

books / book

etc

Some irregular plurals with shorter singular forms

knives / knife

ladies / lady

oxen / ox

wolves / wolf

children / child

Some common non-English plurals that also have shorter singular forms:

appendices / appendix (Latin)

formulae / formula (Latin)

kibbutzim / kibbutz (Hebrew)