raw / roar 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. 👇
raw: (noun) informal terms for nakedness. (adjective) having the surface exposed and painful. (adjective) not treated with heat to prepare it for eating. (adjective) not processed or refined. (adjective) brutally unfair or harsh. (adjective) untempered and unrefined. (adjective) used of wood and furniture. (adjective) lacking training or experience.
roar: (noun) the sound made by a lion. (verb) make a loud noise, as of wind, water, or vehicles. (verb) act or proceed in a riotous, turbulent, or disorderly way; -R.A.Billington. (verb) laugh unrestrainedly and heartily.
raw: r·AA
roar: r·AO·r
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)