parts of speech is the different types of words in a sentence.Figures of speech is how you speak
The parts of speech are the nuts and bolts of language. You can talk about the functions of the parts of speech (nouns, verbs, adjectives, adverbs, prepositions) without any regard to the meanings of the words themselves. Figures of speech are creative uses of language in order to convey certain moods or meanings.
Words are classified as parts of speech based on their function as a word. If they are classified based on their role in the sentence, they are parts of a sentence. (there is not much difference between the two, but there is a difference)
The parts of speech are also known as lexical categories, and they are the groups of certain types of words based on their function in a sentence. They include nouns, verbs, articles, pronouns, conjunctions, adverbs, prepositions, and participles. Figures of speech are words or phrases that have a less literal meaning and are used for literary effect instead of for meaning. A list of many figures of speech are here: http://en.wikipedia.org/wiki/Figures_of_speech
Maybe you are thinking of the parts of speech: noun, pronoun, verb, conjunction, preposition, adverb, adjective, interjection.
Understatement is a figure of speech, not a specific part of speech. It involves presenting something as less important or less serious than it actually is.
Hyperbole is a noun.
Lexis = It is the morpheme or vocabulary in a language that has semantic content. Grammar = a set of structural rules in the appropriate application of the parts of speech in a syntax.
Transitions
No difference, just from different parts of the country.
Tropical in parts of speech
There really isn't much difference between O'Reilly automotive parts and those purchased from Autozone. They are both after market parts manufacturers, as opposed to OEM parts manufacturers. The pricing is fairly similar, so there really isn't much difference between the two brands of parts.
parts are used,spares are extras kept to replace parts when needed