なくて済む/ないで済む => get by without doing ~ N2
も同然 => just like; same as ~ N2
ずに済む => get by without doing ~ N2
て済む => sufficient by; no problem to; resolve by ~ N3
決して~ない => never; by no means ~ N3
と同時に => at the same time as; while; simultaneously ~ N2
[決「けっ」]して~ない => Won’t, isn’t N3
Will, Decision, Doing
~もどうぜんだ(~も同然だ)      => just like; same as ~ N1
に決まっている => certainly; I’m sure/certain that; it must be the case that ~ N2
も[同然「どうぜん」]だ => The same as saying A, as good as A N2
Adjectival, Descriptions
に[決「き」]まっている => A is a given, A must be the case N2
Information, Report