Back-to-back and Coming together

Back-to-back adjective - Following one after another without others coming in between.

Coming together and back-to-back are semantically related. In some cases you can use "Coming together" instead an adjective phrase "Back-to-back".

Coming together noun - The act of joining together as one.

Back-to-back and coming together are semantically related. Sometimes you can use "Back-to-back" instead an adjective "Coming together".