Nouns

(n)nickname, moniker, cognomen, sobriquet, soubriquet, bynamea familiar name for a person (often a shortened version of a person's given name)“Joe's mother would not use his nickname and always called him Joseph”, “Henry's nickname was Slim”
(n)nicknamea descriptive name for a place or thing“the nickname for the U.S. Constitution is `Old Ironsides'”

Verbs

(v)dub, nicknamegive a nickname to