Content structured around a topic's full related vocabulary is often better positioned to be pulled into a featured snippet than content narrowly built around a single phrase.
Comprehensive Coverage Signals a Complete Answer
A section that addresses a question along with its closely related considerations reads as more complete, which favors snippet selection.
Related Terms Help Match Query Variations
Since real searches for the same underlying question vary in phrasing, covering the related vocabulary increases the chance of matching whichever variation is entered.
Still Lead With a Direct, Concise Answer
Related-term depth should support a page's snippet chances, but the direct answer still needs to be stated clearly and early in the relevant section.
Next step: Use the LSI Tool to identify related terms and phrasing variations worth reflecting in your snippet-targeted content.