Simplify the following text for a Grade 12 native English-speaking person.
Original: The `` joinery '' and `` joiner '' usage is obsolete in the USA , although the main carpenters ' trade union still calls itself the United Brotherhood of Carpenters and Joiners of America .
Simplified: The terms joinery and joiner are not used often in the United States any more , but the main carpenters ' trade union still calls itself the United Brotherhood of Carpenters and Joiners of America .