Plural of enneagon; multiple nine-sided polygons.
Simple plural formation of 'enneagon' by adding the English '-s' suffix to the Greek root-derived noun.
The plural 'enneagons' highlights how English grammar rules (just add -s) override the original Greek grammatical system, showing that even ancient mathematical concepts get absorbed into modern English's simpler, more straightforward ways of forming plurals.
Complete word intelligence in one call. Free tier — 50 lookups/day.