great

As a verb great

is .

As a noun optimum is

optimum.

As adjectives the difference between obedient and great

is that obedient is willing to comply with the commands, orders, or instructions of those in authority while great is very big, large scale.

As an interjection great is

expression of gladness and content about something.

As a noun great is

a person of major significance, accomplishment or acclaim.

As an adverb great is

very well in a very satisfactory manner.