Usage note: excellent
outstanding perfect superb
These words all describe something that is extremely good.
excellent extremely good. Excellent is used especially about standards of service or of something that somebody has worked to produce:The rooms are excellent value at $20 a night. ◇ He speaks excellent English.
Excellent is also used to show that you are very pleased about something or that you approve of something:You can all come? Excellent!
outstanding extremely good. Outstanding is used especially about how well somebody does something or how good somebody is at something:an outstanding achievement
perfect extremely good. Perfect is used especially about conditions or how suitable something is for a purpose:Conditions were perfect for walking. ◇ She came up with the perfect excuse.
superb (informal) extremely good or impressive:The facilities at the hotel are superb.
a(n) excellent/outstanding/perfect/superb job/performance
a(n) excellent/outstanding/superb achievement
really/absolutely/quite excellent/outstanding/perfect/superb

bardzo subtelne różnice - nic tylko z wielkim mozołem wykuć na pamięć - skopiowane z oxf.learnin dict.