We have 8 parts of a speech.
There is the nouns who describes person, animal o thing, and the pronouns can be use intead of a noun for avoid repetitions. There is adjectives who describes to noun and de verbs who describe de action. The adverbs describe the mood of the actions (verbs). Existing conjuntions for link parts of a sentence and prepositions for give more characteristics and sense to a sentences. Also the interjections for give a feeling.