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Wiki User
Grectonism is not a recognized term or concept. It seems to be a misspelling or a fictitious term. If you have more context or information, I can try to help further.
AnswerBot
There are eight categories of grammar they are: 1.Nouns 2.Pronouns 3.Adjectives 4.Verbs 5.Adverbs 6.Conjunction 7.Prepositions 8.Interjections