"occasional" - when you do something, but not often, like: "I drink a beer ocassional" - I drink a beer, once for a two months or rarely. "accidental" - you use, when you did something unintentionally, e.g. "I was distracted, and I entered accidentally to ladies' room"

the first person to respond is correct however... gramatically he also needs a bit of help. occasional= "I drink beer occasionally"- I drink a beer once or twice a month. the word can be used in several spellings.. as you asked it would be better fit to say "i have an ocassional beer once or twice a month" accidental- is fairly close also... he is correct again but would be better said if he used " my walking into the ladies room was accidental..... accidental means it was an accident or un-intentional occasional means that what you are reffering to is not a frequent occurance hope this helps you both

yes