Yes, tone is a Scrabble word!

Verb

1. Utter monotonously and repetitively and rhythmically

2. Vary the pitch of one's speech

3. Change the color or tone of

4. Change to a color image

5. Give a healthy elasticity to

Noun

1. The quality of a person's voice

2. (linguistics) a pitch or change in pitch of the voice that serves to distinguish words in tonal languages

3. (music) the distinctive property of a complex sound (a voice or noise or musical sound)

4. The general atmosphere of a place or situation and the effect that it has on people

5. A quality of a given color that differs slightly from another color

6. A notation representing the pitch and duration of a musical sound

7. A steady sound without overtones

8. The elastic tension of living muscles, arteries, etc. that facilitate response to stimuli

9. A musical interval of two semitones

10. The quality of something (an act or a piece of writing) that reveals the attitudes and presuppositions of the author