The phrase "no one two" is a unique and uncommon one, so it is not surprising that there are not many synonyms for it. However, if we break down the meaning into its individual parts, we can find alternative words to use. "No one" is synonymous with "nobody," "none," "nothing," or "zilch." "Two" can be replaced with "double," "pair," "couple," or "duo." So, depending on the context, we can use different synonyms to convey a similar message. For example, instead of saying "no one two showed up for the event," we could say "nobody paired up for the event" or "there was a couple missing from the event".