tool / tule / tulle 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. 👇
tool: (noun) an implement used in the practice of a vocation. (verb) drive. (verb) furnish with tools. (verb) work with a tool.
tule: NA
tulle: (noun) a fine (often starched) net used for veils or tutus or gowns.
tool: t·UW·l
tule: NA
tulle: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)