berg / burg are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
berg: (noun) Austrian composer in Schoenberg's twelve-tone music system (1885-1935).
burg: (noun) colloquial American term for a town.
berg: b·ER·g
burg: b·ER·g
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)