Why search by ending letters?
Endings drive rhyme and rhythm, so a suffix search is a songwriter's and poet's best friend. Enter the sound you want to match and gather a whole set of candidate rhymes in one go. The same search reveals grammatical families — every word ending in "tion", "ment" or "ness" — which is handy for writing and study.
In games, plays sometimes have to finish on a specific tile already on the board, and crosswords frequently give you the last letters of an answer first. A words-ending-with search turns those partial clues into a complete list of options.