Commonwealth
Federation
noun, の adjective
Take along your home country to all the other spaces you want to add to your group. Put them together to form the commonwealth or federation.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
ちょっと待って。もしかして、連邦税と州税どっちも払わなきゃいけないの？
Wait a second. By any chance, do I have to pay both federal and state taxes?