と同時に => at the same time as; while; simultaneously ~ N2
も同然 => just like; same as ~ N2
[時「とき」] => At the time A N5
Time
Vた[時「とき」] => After having done something N5
Time
~もどうぜんだ(~も同然だ)      => just like; same as ~ N1
も[同然「どうぜん」]だ => The same as saying A, as good as A N2
Adjectival, Descriptions