... 前に => Before ... N4
Relationship before and after
も同然 => just like; same as ~ N2
... 前に => ... in front of, before N4
Relationship before and after
前に => before; in front of ~ N5
を前提に => On the premise of N1
Premise
と同時に => at the same time as; while; simultaneously ~ N2
手前 => considering; before; in front of; one’s standpoint N1
~もどうぜんだ(~も同然だ)      => just like; same as ~ N1
~[前「まえ」]に => Before N/Vる(occurs/happens) N5
Time
当然だ/当たり前だ => natural; as a matter of course N2
も[同然「どうぜん」]だ => The same as saying A, as good as A N2
Adjectival, Descriptions