While it’s thought the temperature of the Mars subglacial lake is probably below the freezing point of pure water, the researchers think that a number of factors allow it to remain liquid.
Source: tatoeba (12353117)
Ranked by relevance and common usage.
Keep "subglacial" 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 "subglacial" 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 "subglacial", 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 "subglacial" or choose a simpler alternative from the closest-match group.
3 total sentences available.
While it’s thought the temperature of the Mars subglacial lake is probably below the freezing point of pure water, the researchers think that a number of factors allow it to remain liquid.
Source: tatoeba (12353117)
These streams continue to flow in winter as well as in summer, although in less quantity; […] It is also this melting beneath the ice (subglacial, suppose we call it) which loosens the ice from the ground, and occasions, or rather permits, the perpetual downward movement, with which "The glacier's cold and restless mass / Moves onward day by day."
Source: wiktionary
Securing political approval for even modest changes to railway organisation and structure has been of sub-glacial speed and complexity since 2004, when Government abolished the Strategic Rail Authority and put itself in charge.
Source: wiktionary
Closest matches include slow.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.