spec / speck 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. 👇
spec: NA
speck: (noun) a very small spot. (verb) produce specks in or on.
spec: s·p·EH·k
speck: s·p·EH·k
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)