In perpetuity and Until doomsday

In perpetuity adverb - For life.

Until doomsday and in perpetuity are semantically related. in for keeps topic. In some cases you can replace phrase "Until doomsday" with "In perpetuity", this phrases are similar. informal substitute

In perpetuity and until doomsday are semantically related. Sometimes you can replace phrase "In perpetuity" with "Until doomsday", this phrases are similar.