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