All together and In retrospect

All together adverb - Used of a group whose members acted or were acted upon collectively and when `all' and `together' can be separated by other words.

In retrospect and all together are semantically related. In some cases you can use "In retrospect" instead an adjective phrase "All together".

All together and in retrospect are semantically related. You can use "All together" instead an adjective phrase "In retrospect".