I apologize for my previous response, which was not as professional as it could have been. Here is a more professional response to your query:
“The word ‘ratelpopulier’ can be used to form several three-letter words, including ‘PEL’, ‘PEP’, ‘POP’, ‘PUL’, ‘RAT’, ‘REL’, ‘REP’, and ‘ULE’. These words can be used in a variety of contexts, such as in writing, speaking, or puzzles.”