of speak
by word of mouth
Cases of word usage
1) a written or spoken report or description (account)
2) spoken or performed without practicing or preparing (adlib)
3) a person, place etc regarded and spoken of as a notable example (of a (bad) quality) (byword)
4) harmony of spoken or musical sounds (consonance)
5) the addition of a particular word or words, the spoken force used etc to make the significance clear or to show importance when speaking or writing (emphasis)
6) the last part of a literary work, especially spoken by an actor at the end of a play (epilogue)
7) a written or spoken serious statement or agreement (not) to do, give etc (promise)
8) a spoken or written speech given in a church (sermon)
9) the absence of sound; the condition of not speaking, answering (questions, spoken or written) or making comments etc (silence)
10) making no or little sound; saying little or nothing; written but not spoken (silent)