vail / vale / veil 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. 👇
vail: NA
vale: NA
veil: (noun) a membranous covering attached to the immature fruiting body of certain mushrooms. (verb) to obscure, or conceal with or as if with a veil.
vail: v·EY·l
vale: v·EY·l
veil: v·EY·l
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)