There are 8 parts of speech
Noun, pronoun, adjective, verb , adverb, conjunction, interjection, and preposition.
Noun is a naming word
Pronoun is used instead of noun to avoid repetition.
Adjective describes the nouns
Verb is a action word
Adverb describes the verb
Conjunction connects the nouns , verbs ,noun clause and sentences.
For example : FANBOYS
Preposition shows the relationship
time , place etc
Interjection shows the expressions like hurray , oops etc.