Greek-derived nouns ending in -on change to -a in the plural form.
Declination is regular. It follows the Greek -a rule.
Use plural verbs: "The declinatia are ready" (not "is ready").
Yes. The plural declinatia is standard across all English variants.
The word declination follows the standard English pluralization rule. When forming the plural, declination becomes declinatia. This follows the Greek -a pattern, which is one of the most common plural rules in English.
Understanding why declination becomes declinatia helps with spelling and pronunciation. Greek-derived nouns ending in -on change to -a in the plural form.
When using declinatia in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The declinatia are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.