"One away" is a clue, not a consolation
The game tells you when three of your four belong together. Most players treat that as a near miss and start over. It is the most information you will get all round.
When you submit four words and the game says "one away," it has just told you something enormous: three of those four form part of a real group. Most players read it as a polite way of saying no, scrap the idea, and try something unrelated. That is how a round with one mistake becomes a round with three.
Work out which one is the intruder
You have four candidates for the wrong word. Rank them by how many other homes they could have. The word that also reads naturally as a member of another category on the board is the one to swap out — it is there precisely because the editor expected you to place it here.
Then look for its replacement among the words you have not committed anywhere. Usually there is exactly one that fits the category as cleanly as the three you are keeping.
What "one away" also rules out
It tells you what is not true, which is easy to forget. If two of your four had come from different groups you would not have seen "one away" at all. So any pairing inside your four that you were unsure about is now confirmed, minus one member.
When to abandon the idea anyway
One case justifies it: when three of your four are the obvious reading of a category and the fourth slot has two equally good candidates. That is the shape of a deliberate trap, and guessing between two costs a mistake you may need later. Solve a different group first; whichever candidate it consumes answers the question for free.
