adjective
A word that describes or modifies a noun
Examples: an active mind, this is serious, full and careful in its attention to detail

adverb
A word that modifies a verb, adjective, adverb, preposition, phrase, clause, or sentence
Examples: ran fast, an awfully long speech, she went willingly, do it now

conjunction
A word or phrase that joins together words, phrases, clauses, or sentences
Examples: and, or, but

gerund
A word having the characteristics of both a verb and a noun, usually ending in -ing
Examples: the ice made skiing impossible, her husband's snoring, they're filling the position

noun
A word that is the name of a person, place, or thing
Examples: boy, Churchill, America, river, commotion, poetry

object
A noun or phrase that directly or indirectly receives the action of a verb or follows a preposition
Examples: she rocked the baby, he saw where they were going, I gave him the news, over the rainbow

prefix
A letter, syllable, or word attached to the beginning of a word to change its meaning
Examples: ahistorical, presorted, anti-imperialist, posthypnotic, overextended

preposition
A word or phrase that expresses direction, motion, position, or relationship and takes a noun or pronoun as its object
Examples: a book on the table, you're in big trouble, outside himself, because of that, came from behind, peeking from behind the fence

pronoun
A word used in place of a noun
Examples: she,it, himself, whose, they

proper noun
A capitalized noun that names a particular being or thing
Examples: Susan, Haydn, New York, December, General Motors, Middle Ages

suffix
A letter, syllable, or word added to the end of a word to modify its meaning
Examples: editors, countrywide, Hollywood-ish, umbrella-like

verb
A word or phrase used to express action or a state of being
Examples: leap, carry out, feel, be