'Words,' as in Exodus 34:28, signify everything pertaining to doctrine.

In Genesis 15:1, words signify revelation, after the Lord's boyhood combats. (Arcana Coelestia 1787)

Words signify things, and things are goods and truths. (Arcana Coelestia 1785, 1801, 5272)

In Genesis 11:1, this signifies unity of doctrine. (Arcana Coelestia 1288)

In Exodus 8:10, 13, words signify communication of the Lord's Word and confirmation. (Arcana Coelestia 7406)

In Exodus 20:1, this signifies divine truths for people who are in the heavens and on earth. (Arcana Coelestia 8861, 8862)