There are many antonyms for the phrase "smelled out," which means to uncover or detect something through careful investigation or examination. Some opposite words include ignoring, neglecting, overlooking, dismissing, and disregarding. These words suggest a lack of interest or attention to discovering something that might be hidden or unknown. Conversely, words like exploring, investigating, scrutinizing, and examining could be considered synonyms for "smelled out" since they indicate a careful search for information or knowledge. It's important to use the correct antonym depending on the context of the situation, which will help convey a more accurate and complete meaning.