him / hymn 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. 👇
him: NA
hymn: (noun) a song of praise (to God or to a saint or to a nation). (verb) sing a hymn. (verb) praise by singing a hymn.
him: hh·IH·m
hymn: hh·IH·m
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)