The Semantic Index is a set of contextually relevant terms derived from live search results for any given keyword. Their statistical relevance is derived algorithmically and weighted based on SEO metrics.
If your search term is too broad, too ambiguous, or crosses several different topic areas, the returned semantic index may include multiple, potentially unrelated topics. These unrelated terms in the index are a reflection of contextually dissimilar search results.
To produce a more contextually relevant semantic index, try a more focused search term which more clearly communicates search intent.