buckaroo vs vaquero

buckaroo and vaquero both are nouns.

Word	Noun	Adjective	Verb	Adverb
buckaroo	Yes	No	No	No
vaquero	Yes	No	No	No

As nouns, buckaroo and vaquero are synonyms defined as:

buckaroo and vaquero: local names for a cowboy (`vaquero' is used especially in southwestern and central Texas and `buckaroo' is used especially in California)

Other synonyms of buckaroo include buckeroo.

buckaroo (noun)	vaquero (noun)
local names for a cowboy (`vaquero' is used especially in southwestern and central Texas and `buckaroo' is used especially in California)	local names for a cowboy (`vaquero' is used especially in southwestern and central Texas and `buckaroo' is used especially in California)