berth / birth 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. 👇
berth: (noun) a bed on a ship or train; usually in tiers. (verb) provide with a berth.
birth: (noun) the time when something begins (especially life). (noun) the event of being born. (noun) a baby born; an offspring.
berth: b·ER·th
birth: b·ER·th
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)