The rule for "unlimited" actually does cover it: "Sometimes you may have multiple unguessed words related to clues from the previous rounds. If you want your

The rule for "unlimited" actually does cover it: "Sometimes you may have multiple unguessed words related to clues from the previous rounds. If you want your team to guess more than one of them, you may say unlimited instead of a number." You can't use "unlimited" as you're proposing - it's allowed only if there are multiple unguessed words from previous clues. That said, the "0" approach isn't banned by the rules and would work the same way.