be as good as one's word

約束を必ず守る

be as good as one's word の類語

keep one's word, stand by one's word, keep one's promise, responsible, honor one's promise, honest, reliable, follow through, credible, trustworthy, dependable

be as good as one's word の言い換えを探すには

be as good as one's word（約束を必ず守る）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。