Baychilla
is one Smokin' Farker
What are you? The trademark police? Get a grip. The word "lumberjack" has been in use since 1831 and used for a variety of products. Lumberjack is hardly unique or an invention of a single company.
You need to vigorously defend a trademark or you can end up losing it. Hence why most companies are very strict about potential infringement. One of the tests for infringement is if the competing thing is likely to cause confusion.
It wouldn't take a rocket surgeon to argue that a charcoal company selling combustible fuel products to BBQers using the name Lumberjack is likely to cause confusion with the pellet company Lumberjack that is in the business of selling combustible fuels to BBQers.
The Lumberjack pellet company may wish to consult their counsel.
Edit: This post should not be construed as legal advice. JMO.