A good word is a Sadaqa
The Prophet of Rahmah, the Intercessor of Ummah, the Owner of Jannah (May Peace and blessing of ALLAH be upon him) has said, a good word is a Sadaqa; and every step that you take towards prayer is a Sadaqa.
(Sahih Bukhari, vol. 2, pp. 279, Hadis 2891)