holey / holy / wholly 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. 👇
holey: (adjective) allowing passage in and out.
holy: (adjective) belonging to or derived from or associated with a divine power.
wholly: (adverb) to a complete degree or to the full or entire extent (`whole' is often used informally for `wholly').
holey: NA
holy: hh·OW·l·iy
wholly: hh·OW·l·iy
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)