bit bored and wanted to level bonecraft but am level 0 synergy as well.

I am reading all i can about synergy think i got basic and gneral idea how to work it.

Can you synergise any reipce that is the same as a regular craft or are the choices limited by synergy? I am kind of hoping i can level both at the same time. pump out steady fails on a random bonecraft recipe leveling syngery and bonecraft at about the same time / rate. Or do i have to level them seperately?