cornu

As a letter s

is the letter s with a.

As a noun cornu is

a horn, or anything shaped like or resembling a horn.

As nouns the difference between cornu and corns

is that cornu is a horn, or anything shaped like or resembling a horn while corns is plural of corn.

As a noun cornu

is a horn, or anything shaped like or resembling a horn.

As an adjective corny is

insipid or trite or corny can be (obsolete) strong, stiff, or hard, like a horn; resembling horn.

Corn is a descendant of cornu.

As nouns the difference between cornu and corn

is that cornu is a horn, or anything shaped like or resembling a horn while corn is the main cereal plant grown for its grain in a given region, such as oats in parts of Scotland and Ireland, and wheat or barley in England and Wales.

As a verb corn is

to granulate; to form a substance into grains.