flours / flowers 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. 👇
flours: (noun) fine powdery foodstuff obtained by grinding and sifting the meal of a cereal grain. (verb) cover with flour. (verb) convert grain into flour.
flowers: (noun) a plant cultivated for its blooms or blossoms. (noun) reproductive organ of angiosperm plants especially one having showy or colorful parts. (noun) the period of greatest prosperity or productivity.
flours: f·l·AW·er·z
flowers: f·l·AW·er·z
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)