British spelling: a person who eulogises or speaks/writes praises about someone.
Agent noun formed by adding '-er' to the British verb 'eulogise.' The 's' is preserved from the verb stem, following British English conventions.
Agent nouns (people who do something) with '-er' are incredibly productive in English—we can attach it to almost any verb to create new words for 'people who verb,' and speakers instinctively understand these new words.
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