The route reaches the final bridge POOR, then changes letter 4 to reach POOP. Its 7 moves match the dictionary distance calculated from the target.
Compare the first move
NANO has 2 accepted one-letter neighbors in this vocabulary. 1 can begin a shortest route: MANO. Each leaves exactly 6 moves to POOP.
Some longer openings are NANA (9 total moves). These counts include the first move from NANO.
Similarity can be misleading
NANO → MANO, MONO → MONS, MOOS → MOOR do not reduce the number of letters that differ from POOP, but still belong to a minimum-move route. Reachable word connections matter more than matching letters immediately.
If a word is rejected
Enter the last accepted word in the solver, exclude the rejected word, and recalculate. A shorter dictionary can require more moves. Read the strategy guide for a worked detour example.
