ROOKIE
cub, greenhorn, rookie
(noun) an awkward and inexperienced youth
Source: WordNet® 3.1
Etymology
Noun
rookie (plural rookies)
An inexperienced recruit, especially in the police or armed forces.
A novice.
An athlete either new to the sport or to a team or in his first year of professional competition, especially said of baseball, basketball, hockey and American football players.
(British) A type of firecracker, used by farmers to scare rooks.
Synonyms
• beginner
• newbie
• noob
• tyro
• novice
• See also beginner
Adjective
rookie (comparative rookier, )
non-professional; amateur
Source: Wiktionary