These are everyday words familiar to every literate ancient Egyptian.
Of course they aren't every word in the language. Remember Zipf's Law? Since this language breaks it it follows that if more writing was known it would also break it; ie- few additional words would appear because this language had very few words.
Somehow people have the idea that the reason nothing is known about the pyramids, their builders, or the language is that there is so little evidence. This isn't strictly true. Nothing is known because we interpret the evidence incorrectly. We dismiss the writing as the ravings of sun addled maniacs and the physical evidence as a rotten heap of red herrings.
When all the evidence is seen as part of a whole then it actually makes sense and there are no dead fish.