When God speaks, it is the word of God. In the old testament God spoke directly to the prophets. He spoke to others through them.
Jesus is the supreme manifestation of the word of God.
When Gabriel spoke the word of God to Mary, Jesus was born in her.
Writetoknow,
From what I gathered based upon the above texts, you do not believe in a pre-human existence for Jesus called the Word in scripture. If this is not the case then please disregard these comments. The Church of God, Faith of Abraham for one has such a view. Many words are flexible and you give examples for how "word" is used in scripture but I did not see anything that indicated that it could also be used as an identity for someone that functioned in that capacity. A functional name or title would be another way to identify a real Being or entity such as the Word that literally and personally created the human race at God’s behest. So is it true then that God used other Beings, real living and non human entities to function in His behalf even identifying themselves by the name of God as if they were true God? To this I would answer yes! This is why it is said: 4 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth. This is true because all other humans were personlly begotten by the Word in the beginning. Only the now human Word or human Son (even called God) was begotten by the Father and this exception was now duly noted. Such fine detail is often ignored but it was not in this case. We do not find God speaking directly to the prophets as you said here. What we do find is: 2 And the angel of the LORD appeared unto him in a flame of fire out of the midst of a bush: and he looked, and, behold, the bush burned with fire, and the bush was not consumed. And we find this and other such ways that God operates even accepting information gathered by others who report to Him. Job 1:6 Now there was a day when the sons of God came to present themselves before the LORD, and Satan came also among them. . . Job 1:8 And the LORD said unto Satan, Hast thou considered my servant Job, that there is none like him in the earth, a perfect and an upright man, one that feareth God, and escheweth evil? Therefore we would expect to find that it would be a real living Being or entity of which it is said: Ro 8:34 Who is he that condemneth? It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us.
Joseph