Id argue the concept of sola anything is heresy, all of it works together.
but the grace of God enables the hope of salvation. "Saved by grace through faith" "how can they believe except they hear? How can they hear without a preacher" "faith cometh by hearing, and hearing by the word of God"
So the word of God is powerless unless it is believed.
And grace is made void if there is no faith.
Mind you this is all in connection to salvation.
God is holy, gracious and the word regardless if believed or heard.