summary / summery 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. 👇
summary: (noun) a brief statement that presents the main points in a concise form.
summery: (adjective) belonging to or characteristic of or occurring in summer.
summary: s·AH·m·er·iy
summery: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)