The eight part of speech? ?

The eighth part of speech is the interjection. Interjections are words or phrases that express strong emotions or feelings and are often used to convey excitement, surprise, or emphasis. Examples of interjections include "wow," "ouch," "oh," and "hey."

1. Noun
2. Pronoun
3. Verb
4. Adjective
5. Adverb
6. Preposition
7. Conjunction
8. Interjection