Nouns ending in -s, -x, -z, -ch, or -sh add -es to form the plural. This makes the word easier to pronounce.
Catalysis is regular. It follows the -es Addition rule.
Use plural verbs: "The catalysises are ready" (not "is ready").
Yes. The plural catalysises is standard across all English variants.
The word catalysis follows the standard English pluralization rule. When forming the plural, catalysis becomes catalysises. This follows the -es Addition pattern, which is one of the most common plural rules in English.
Understanding why catalysis becomes catalysises helps with spelling and pronunciation. Nouns ending in -s, -x, -z, -ch, or -sh add -es to form the plural. This makes the word easier to pronounce.
When using catalysises in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The catalysises are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.