Verb describes an action or a state; e.g. run, stand, like, bite
Adverb describes verbs, adjectives and adverbs; e.g. slightly, very, fiercely
Noun names things, people, animals et caetera; e.g. baby, cart, shovel
Pronoun stands in nouns place in certain situations; e.g. he, they, us
Adjective describes noun's qualities; e.g. pretty, spicy, selfish
Conjunction joins clauses, words and sentences together to form a bigger structure; e.g. while, yet, but
Preposition connects a noun with another word; e.g. from, by, through
Interjection is an exclamation; e.g. alas!, oh!, hey!