missals / missiles 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. 👇
missals: (noun) (Roman Catholic Church) a book containing all the prayers and responses needed to celebrate Mass throughout the year.
missiles: (noun) a rocket carrying a warhead of conventional or nuclear explosives; may be ballistic or directed by remote control.
missals: NA
missiles: m·IH·s·ah·l·z
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)