i don't believe there is another word that means exactly that number. There is penta-, which is a prefix that means 5, pentagon which is a 5 sided figure, quintuplets which is 5 babies born together or a slang term for 5 things...
add?
There is no precise opposite, but laugh is a good possibility.
A five letter word that is the opposite of the word "gradual" and contains a second letter of "l" is a popular word game answer. The five letter word being sought is "fleet."
The opposite of "sad" with five letters is "happy." It conveys a sense of joy and contentment, contrasting the feelings associated with sadness.
The opposite of "sweet" is "sour."
Opposite day is actually many days, five to be precise. It is on January 19, March 14, June 15, October 2, and December 31.
Opposite faces always add to 7. Two is opposite five.
The expression "plus twelve minus five" simplifies to seven (12 - 5 = 7). The opposite of seven is negative seven. Therefore, the opposite of plus twelve minus five is negative seven.
enter
A five letter word meaning the opposite of hurry would be dally. There may well be others
There is no precise opposite, but laugh is a good possibility.
least
plain
front
night
Sharp
awake
Happy.