The interesting thing about the word for ‘palace’ in Homer is that there is no such word. All the words that mean ‘house’ (δόμος, δῶ, δῶμα, μέγαρον, οἶκος, οἰκία) may be applied to a royal palace, but all of them (and their plurals) may equally well be used of the house of an ordinary citizen, μέγαρον is often translated ‘palace’, or some other word with connotations of kingly majesty. But it too, when it is not more narrowly localised to the living-room, means just a house in general.
Just as there is no separate word to designate a palace in Homer (τὰ βασίλεια occurs first in Herodotus), so a qualifying adjective is never used to indicate that a particular house is ‘royal’ (the first occurrence of such a periphrasis is βασίλειοι οἶκοι Aeschylus, Ag. 157). In fact, to Homer there is no sharp distinction between a palace and a house, except that a king is likely to have a bigger and better home, more sumptuously furnished.
The Iliad and the Odyssey are much concerned with kings. So it is odd that no word serves to designate the king's palace and no other dwelling, especially when the poet so delights in describing the splendour of royal homes (for example, the description of Alcinous' palace and its grounds in Od. vii 81 ff.). The major archaeological sites of the Mycenaean period, in which the main stories of the poems are set, all contain a palace which is easily recognised, even in its ruinous state. Can one imagine a new arrival at a great Mycenaean site needing to be shown which was the palace, as Odysseus was shown at Phaeacia? It seems highly unlikely that the Mycenaeans should have had no special word for a palace, though there is so far no firm evidence for (or against) the existence of such a word in Linear B. If a ‘palace’ word existed, its special significance, if not the word itself, must have been forgotten by Homer's time, when a great many houses might be found within the city wall, as at Smyrna. There may, however, be traces of the ‘palace’ meaning still detectable.
In Table 1, which has been compiled from the concordances of Prendergast and Dunbar, I have tabulated the frequency with which each of the regular words for ‘house’ is used to denote a dwelling occupied by gods, lesser divinities, mortals or animals. Various interesting points arise from this table.
It is apparent that there is a far higher proportion of gods' houses mentioned in the Iliad than in the Odyssey. The figures for δόμος and δῶμα show this particularly clearly. But the difference is probably due entirely to the subject-matter: far more of the action is taken up with scenes among the gods in the Iliad than in the Odyssey.