stand by one's word

約束を守り通す

stand by one's word の類語

keep one's word, be as good as one's word, keep one's promise, honor one's promise, follow through

stand by one's word の言い換えを探すには

stand by one's word（約束を守り通す）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。