Indicates 'as good as', 'virtually', or 'practically'.
Verb-て form + も同然だ, い-Adjective + くても同然だ, な-Adjective + であっても同然だ, Noun + であっても同然だ
The ～も同然だ grammar point is used to express that something is as good as, virtually, or practically the same as something else, even though it is not exactly the same. It implies that there is hardly any difference between the two. This grammar point can be used with verbs, い-adjectives, な-adjectives, and nouns.