What does "all one" mean?

A matter of indifference; a matter involving a distinction without a difference; a matter having no importance or consequence.

What is a synonym for "all one"?

Common synonyms include: alike, coequal, convertible, coordinate, correspondent, corresponding.

noun

noun ·Rare ·Advanced level

Noun

1
A matter of indifference; a matter involving a distinction without a difference; a matter having no importance or consequence. uncountable
"Near-synonyms: all the same, monolithic, of a kind, of a piece, cut from the same cloth"

"Near-synonyms: all the same, monolithic, of a kind, of a piece, cut from the same cloth"