do / doe / dough 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. 👇
do: (noun) the syllable naming the first (tonic) note of any major scale in solmization. (verb) get (something) done. (verb) proceed or get along. (verb) create or design, often in a certain way. (verb) carry on or function. (verb) travel or traverse (a distance).
doe: (noun) mature female of mammals of which the male is called `buck'.
dough: (noun) a flour mixture stiff enough to knead or roll.
do: d·UW
doe: d·OW
dough: d·OW
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)