purple group · The short answer
ENDING IN PALINDROMES
Each puzzle word passes the same exact test. The four mappings show how the answer works.
AFTERNOON finishes with NOON, a four-letter sequence that remains NOON when its letters are read in reverse order.
PATOOT finishes with TOOT, which has the same letter order when read from right to left as from left to right.
RHEOSTATS finishes with STATS, a five-letter palindrome centered on the letter A.
SHREDDER finishes with REDDER, a six-letter palindrome whose mirrored letter pairs surround the central DD.
Why this group was difficult
- The connection is orthographic rather than semantic
Definitions and subject areas provide no useful common theme because the rule applies to letter patterns at the ends of the words. - The palindrome lengths are inconsistent
NOON and TOOT have four letters, STATS has five and REDDER has six, so a fixed suffix length will not reveal the set. - The complete words are not palindromes
Reading each entire entry backward fails, which can cause a solver to reject palindrome wordplay before examining shorter endings. - RHEOSTATS conceals a familiar word at its edge
Its length and technical appearance make the final STATS less visually prominent than NOON or TOOT.
How to spot this pattern next time
When the leftover words share no credible meaning, inspect prefixes, suffixes, embedded words, sounds and letter shapes before forcing a semantic category.
Do not impose one suffix length. Starting at the final letter, expand each ending until a clean reversible sequence appears.
Four useful facts behind the group
- The official category wording is exactly ENDING IN PALINDROMES.
- Only each word’s final segment must read the same backward.
- The palindrome endings range from four to six letters long.
- The four endings are NOON, TOOT, STATS and REDDER.
Questions players ask
The details people search after seeing the group
What connects AFTERNOON, PATOOT, RHEOSTATS and SHREDDER?
Their endings are palindromes: AFTERNOON ends in NOON, PATOOT in TOOT, RHEOSTATS in STATS and SHREDDER in REDDER.
Are the four complete words palindromes?
No. The official category says ENDING IN PALINDROMES, so only a final portion of each word must read identically in both directions.
How does RHEOSTATS fit the palindrome group?
The final five letters of RHEOSTATS are STATS, which reads as STATS whether followed from left to right or right to left.
Why is SHREDDER included?
SHREDDER ends with the six-letter sequence REDDER, whose letters form the same word when their order is reversed.
How can I spot a palindrome-ending group again?
Inspect the final letters of semantically unrelated leftovers and allow the reversible segments to have different lengths from word to word.