with one voice

異口同音

with one voice の類語

as one, in unison, together, back to back, hand in hand, jointly, unanimously, at one, concurrently, all together, unchallenged, unopposed, simultaneously, agreeing, collectively, unanimous, one and all, like minded, solid, in harmony, at the same time, uncontested, harmoniously, concurrent, concordant

with one voice の反意語

opposed

with one voice の言い換えを探すには

with one voice（異口同音）の類語・言い換え（パラフレーズ）を、日本語訳つきで関連度順に並べています。英作文の語彙を増やしたいとき、長文読解で本文と選択肢の言い換えを見抜きたいときに使えます。