The Chinese word for year is
年

nián

Chinese Definition

year
1. 名词. 年

年
1. year (in generic contexts)
明年 - next year
2012 年 - the year of 2012
2. harvest
豐年 - year with a good harvest
3. annual
年報 - annual report
4. age
年滿二十 - to reach twenty years of age
延年益壽 - to prolong life
5. period of life
童年 - childhood
6. period (in history)
^清朝末年 - last years of the Qing dynasty
7. Chinese New Year
過年 - to spend the Chinese New Year
8. things for the Chinese New Year
年糕 - nian gao
年貨 - New Year purchases
兩年前 - two years ago
^年 ^羹-堯 - Nian Gengyao
9. usage. Although 年 is the generic term for year, years of age are typically expressed in 歲 are traditionally reckoned using the Chinese lunar calendar, beginning with 1 at the moment of birth and increasing

年頭
1. n. year
2. n. period of many years; long time
這建築看.上去有些年頭了。 - This building looks old.
3. n. the times
4. n. harvest
5. n. beginning of the year

年头
1. Simplified form of 年頭

年度
1. n. year (as determined for administrative purposes, such as an academic year, financial year, etc.)
2. adj. (attributive) annual

年級
1. n. (education) grade; year
你讀幾年級？ - What grade are you in?
我讀九年級。 - I'm in ninth grade in the North American system.
2. n. (Taiwan) generation of a certain decade (according to the Republic of China calendar)
九年級 - generation of 90-99 ROC (2001-2011 A. D.)