Plural of ennoblement; multiple acts, instances, or processes of ennobling.
Standard English plural formation of 'ennoblement' (ennoble + -ment + -s), following regular morphological rules established by the 16th century.
The plural form reminds us that ennoblements were regular historical events—documents from medieval and early modern Europe record lists of nobles created through ennoblement ceremonies, showing it was common enough to require a plural form.
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