baron / barren 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. 👇
baron: (noun) a nobleman (in various countries) of varying rank. (noun) a British peer of the lowest rank. (noun) a very wealthy or powerful businessman.
barren: (noun) an uninhabited wilderness that is worthless for cultivation. (adjective) not bearing offspring. (adjective) completely wanting or lacking.
baron: b·AE·r·ah·n
barren: b·AE·r·ah·n
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)