IPA: //ˌbʌkəˈruː//
KK: /bʌkəˌru/
A person, especially in the Western United States, who works with cattle and horses, similar to a cowboy.
The buckaroo rode his horse across the open range, rounding up cattle.
Buckaroo is derived from the Spanish word 'vaquero' (meaning cowherd or cowboy), which itself comes from 'vaca' (meaning cow). The term evolved in American English to refer to a cowboy, particularly in the western United States.
Think of a 'vaquero' as a Spanish cowboy, and remember that a 'buckaroo' is another term for a cowboy, especially in the American West.
No commonly confused words.