The methodology of comparative linguistics, together with the relative homogeneity of Oceanic languages, make it possible to reconstruct with reasonable certainty the principallinguistic properties of their common ancestor, Proto-Oceanic. Like all scientific hypotheses, these reconstructions must be understood as obviously reflecting the state of science at a particular moment in time; the detail of these reconstructions is still the object of much discussion among Oceanicist scholars.
Phonology
The phonology of POc can be reconstructed with reasonable certainty. Proto-Oceanic had five vowels: *i, *e, *a, *o, *u, with no length contrast. Twenty-three consonants are reconstructed. When the conventional transcription of a protophoneme differs from its value in the IPA, the latter is indicated:
Many Oceanic languages of New Guinea, Vanuatu, the Solomon Islands, and Micronesia are SVO, or verb-medial, languages. SOV, or verb-final, word order is considered to be typologically unusual for Austronesian languages, and is only found in some Oceanic languages of New Guinea and to a more limited extent, the Solomon Islands. This is because SOV word order is very common in some non-Austronesian Papuan languages in contact with Oceanic languages. In turn, most Polynesian languages, and several languages of New Caledonia, have the VSO word order. Whether Proto-Oceanic had SVO or VSO is still debatable.
Lexicon
Animal names
Plant names
Pawley and Ross (2006)
Reconstructed Proto-Oceanic terms for horticulture and food plants : ;Tubers and their culture: ;Bananas: ;Other food plants: ;Gardening practices:
Ross (2008)
Reconstructed plant terms from Malcolm Ross : ;Proto-Oceanic plant terms inherited from Proto-Austronesian or Proto-Malayo-Polynesian ;Proto-Oceanic plant terms inherited from Proto-Central-Eastern Malayo-Polynesian ;Proto-Oceanic plant terms inherited from Proto-Eastern Malayo-Polynesian ;Reconstructed terms with no external cognates ;Proto-Oceanic plant terms with no known non-Oceanic cognates ;Proto-Western Oceanic plant terms with no known external cognates ;Proto-Eastern Oceanic plant terms with no known external cognates ;Proto-Remote Oceanic plant terms with no known external cognates