Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Q: pay, praise, fire, inferno, let go

A: inferno
****
Q: format, file, support, text, download

A: support
****
Q: knockout, punch, lifeline, level, deck

A:
lifeline
****