Great
Part of speech: noun
Definition: A person of major significance, accomplishment or acclaim.
Part of speech: interjection
Definition: Expression of gladness and content about something. sarcastic inversion thereof.
Part of speech: adjective
Definition: Very big, large scale. Very good. Important. Title referring to an important leader.
Example sentence: I firmly believe that any man's finest hour, the greatest fulfillment of all that he holds dear, is that moment when he has worked his heart out in a good cause and lies exhausted on the field of battle - victorious.
Big
Part of speech: noun
Definition: An important or powerful person; a celebrity; a big name.
Part of speech: adjective
Definition: Of a great size; large;Thought to have undue influence.Popular.Adult.Fat.Important or significant.(construed with on) Enthusiastic (about).Mature, conscientious, principled.
Example sentence: Take the attitude of a student, never be too big to ask questions, never know too much to learn something new.