adulteress / adulterous 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. 👇
adulteress: (noun) a woman adulterer.
adulterous: (adjective) characterized by adultery. (adjective) not faithful to a spouse or lover.
adulteress: NA
adulterous: ah·d·AH·l·t·er·ah·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)