Best domain for high rankings

We keep getting questions from our users is there a criteria when it comes to top rankings in search engines. Google and other search engines have advanced sophisticated algorithms to separate combined words in URLs. we don't need specific domains with underscores or hyphens
Google is smart enough for e.g. to find words "good guy" in "goodguy.com"



Apart from words in domain age of domain plays a very important role when it comes to search engine optimization and search engine ranking.