board / bored 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. 👇
board: (noun) a committee having supervisory powers. (noun) a stout length of sawn timber; made in a wide variety of sizes and used for many purposes. (noun) a flat piece of material designed for a special purpose. (noun) food or meals in general. (noun) a flat portable surface (usually rectangular) designed for board games. (verb) get on board of (trains, buses, ships, aircraft, etc.). (verb) live and take one's meals at or in. (verb) lodge and take meals (at). (verb) provide food and lodging (for).
bored: (verb) cause to be bored. (verb) make a hole, especially with a pointed power or hand tool. (adjective) tired of the world.
board: b·AO·r·d
bored: b·AO·r·d
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)