'Word' in the Bible

Not as though the word of God hath taken none effect. For they are not all Israel, which are of Israel:

For this is the word of promise, At this time will I come, and Sara shall have a son.

But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;

So then faith cometh by hearing, and hearing by the word of God.

For I will not dare to speak of any of those things which Christ hath not wrought by me, to make the Gentiles obedient, by word and deed,