Another word for burthen

"It has been hitherto," Cromwell said, "a matter of, I think, but philosophical discourse, that a great place, a great authority, is a great burthen.

Dacca is watered by a network of rivers and streams, ten of which are navigable throughout the year by native cargo boats of four tons burthen.

None of them is navigable in the mountain valleys; but the Tista, after it debouches on the plains, can be navigated by cargo boats of considerable burthen.

His only burthen was to give help to the Roman side in war; within his kingdom he was free, and his dominions flourished as no part of Sicily had flourished since the days of Timoleon.

Seven bishops, who presented Trial of a petition asking him to relieve the clergy from the burthen of proclaiming what they believed to be illegal, were brought to trial for publishing a seditious libel.