Hi, these three verbs have more or less the same meaning but the first is more colloquial and you wouldn't say it in a formal context and would rarely write it. The third, "while away" is slightly different since it is intentionally spending time doing something just to pass the time, while you may "pass time doing something" just because you want to do it. " You could also use "spend" interchangeably with "pass".
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AnonymousFollowing that question I ask you if "Now I have time to Kill the time" can mean same as "I got time to kill"."I got time to kill" is a slang version of "I have time to kill." "Time to kill the time" is not used, in my experience.