Fulfil and fulfill are both correct spellings of the same word. It means “to put into effect,” “to achieve,” “to carry out,” or “to realize.” Fulfil is the spelling commonly used in English speaking countries like the UK and Australia. Fulfill is the spelling commonly used in the United States.

What is a fulfiller?

To bring into actuality; effect or make real: fulfilled their promises; fulfilled her dream.

Which is correct fulfillment or Fulfilment?

For people who speak and write British English, fulfilment — with just two Ls instead of three — is the proper spelling. In American English, fulfillment with three Ls is the more common spelling, though both spellings are correct.