Here's a breakdown:
* "Long" sounds usually refer to vowel sounds that are pronounced the same way as the letter's name (like saying "A" for the letter A).
* Words can end in a variety of vowel sounds, including those considered "long".
So, instead of saying "words ending in a long sound", we should say "words ending in a specific vowel sound".
For example, you could ask:
* "What words end in the long 'A' sound (like in 'say')?" Some examples are: day, play, way.
* "What words end in the long 'E' sound (like in 'tree')?" Some examples are: see, free, knee.
Let me know which specific vowel sound you're interested in, and I can give you some words!