Question

Different than its English equivalent, _____ can be used both as a greeting and a farewell.

Answer 1

"Buenos dias" can be used as both a greeting and a farewell. 

Answer 2

One answer is "Buenos dias", or "buen dia",which means "good morning" or "good day". These phrases can be used as both a greeting or farewell. Conversely, "good morning" in English is generally used as a greeting.