rigger / rigor 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. 👇
rigger: (noun) someone who rigs ships. (noun) a long slender pointed sable brush used by artists. (noun) someone who works on an oil rig. (noun) a sailing vessel with a specified rig.
rigor: NA
rigger: NA
rigor: r·IH·g·er
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)