Interpel is a word defined as questioning or challenging someone, typically a public figure or politician. There are a variety of synonyms that can be used in place of interpel, including interrogate, cross-examine, grill, challenge, and scrutinize. Each of these words implies a level of scrutiny or intensity in questioning, but can be used in specific contexts. "Interrogate" is often used in relation to the police, while "cross-examine" is used more in the legal field. "Grill" has a connotation of being particularly intense or aggressive in questioning, while "scrutinize" implies a more careful examination of information or evidence. Regardless of the word used, these synonyms all suggest a focused and detailed examination of a subject.