Synonyms of all the same in English:

all the same

See US English definition of all the same

See UK English definition of all the same

See Spanish definition of igual


1‘I was frightened all the same’

in spite of everything, in spite of that, nevertheless, nonetheless, even so, however, but, still, yet, though, be that as it may, for all that, despite everything, despite that, after everything, having said that, just the same, at the same time, in any event, come what may, at any rate, notwithstanding, regardless, anyway, anyhow
informal still and all
archaic howbeit, withal, natheless

2‘it's all the same to me—see if I care’

immaterial, of no importance, of no consequence, inconsequential, unimportant, of no matter, of no moment, of little account, irrelevant, insignificant, trivial, petty, slight, inappreciable

of great importance