licker / liquor 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. 👇
licker: NA
liquor: (noun) an alcoholic beverage that is distilled rather than fermented. (noun) a liquid substance that is a solution (or emulsion or suspension) used or obtained in an industrial process. (noun) the liquid in which vegetables or meat have be cooked.
licker: l·IH·k·er
liquor: l·IH·k·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)