Board Thread:Community Announcements and Events/@comment-172.10.180.154-20131130005048/@comment-5123071-20131130035311

A list of all word wall locations can be found here.

If you are referring to the Bend Will shout for Dragon Riding. The word wall is at Saering's Watch, then at the end of The Gardener of Men Hermaeus Mora will teach you the last two words.