To make a promise.

To say a single word; to speak at all.

simple past tense and past participle of words fail someone.

present participle of words fail someone.

To speak favourably of someone to someone else, in order to help them out.

Synonym of good as one's word

Do what one has said one will do.

Dated form of play on words.

plural of play upon words

plural of Humpty Dumpty word