EXPERIENCE without A/AN (UNCOUNTABLE) => knowledge or skill gained through the doing something.
|1)||EXPERIENCE||(COUNTABLE) an event that affects or involves you
(UNCOUNTABLE) skill or knowledge that you get by doing sth
|2)||NOISE||(COUNTABLE) a particular noise
(UNCOUNATABLE) an unpleasantly loud sound
|3)||IMPROVEMENT||(COUNTABLE) the quality of being better than before
(UNCOUNATABLE) the act of improving something
|4)||ROOM||(COUNTABLE) a room in a house/hotel etc.
|5)||SUCCESS||(COUNTABLE) a person or thing that is successful
(UNCOUNATABLE) the attainment of something desired or intended
|6)||GRAMMAR||(COUNTABLE) a book that describes grammar rules
(UNCOUNATABLE) the set of rules that explain how words are used