Ranked by relevance and common usage.
Keep "neptunian" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "neptunian" intact in the sentence you are editing.
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "neptunian", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "neptunian" or choose a simpler alternative from the closest-match group.
6 translations across 5 languages.
28 total sentences available.
When now the Gods have made proud Ilion fall, / and Asia's power and Priam's race renowned / o'erwhelmed in ruin undeserved, and all / Neptunian Troy lies smouldering on the ground, / in desert lands, to diverse exile bound, / celestial portents bid us forth to fare; / where Ida's heights above Antandros frowned, / a fleet we build, and gather crews, unware / which way the Fates will lead, what home is ours and where.
Source: tatoeba (6916441)
We have watched the fortunes of eight successive human species for a thousand million years, the first half of that flicker which is the duration of man. Ten more species now succeed one another, or are contemporary, on the plains of Neptune. We, the Last Men, are the Eighteenth Men. Of the eight pre-Neptunian species, some, as we have seen, remained always primitive; many achieved at least a confused and fleeting civilization, and one, the brilliant Fifth, was already wakening into true humanity when misfortune crushed it. The ten Neptunian species show an even greater diversity. They range from the instinctive animal to modes of consciousness never before attained. The definitely sub-human degenerate types are confined mostly to the first six hundred million years of man's sojourn on Neptune.
Source: tatoeba (8877787)
Near-synonym: Poseidonian
Source: wiktionary
The Tomb disburd'ning, whence the Ghoſt aroſe / Of great Achilles; Such when Thracian Foes / (The Prelude of thy Fates, Troy!) he o'rethrew, / And the white hair'd Neptunian Cycnus [i.e., Neptune's son] ſlew.
Source: wiktionary
Showing 4 of 28 available sentences.
Closest matches include sailor.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.