The phrase "an extensive fund" is correct and usable in written English.
It can be used when referring to a large amount of money or resources set aside for a specific purpose, such as investment, charity, or research.
Example: "The organization has established an extensive fund to support environmental conservation projects around the world."
Alternatives: "a substantial fund" or "a large fund".
But Mr. Pataki, who is safely ensconced in his third term, has an extensive fund-raising apparatus and a donor list that is the envy of Republicans and Democrats alike.
Her extensive fund of life experiences were guided by a spirit of inquiry, curiosity and discussion.
The pope appointed a priest with extensive funds with which to provide food, clothing and medicine.
It's not just the layers of red tape, laws and mandates that have to be navigated which create difficulties, but developing such a park requires extensive funding beyond the ordinary civic project in order to meet the long list of accommodations needed.
Chandler allocated funds for free textbooks for the state's school children, created a teacher's pension fund, and provided extensive funding for the state's colleges and universities.
Extensive funding has been promised for a range of events and programmes from September 2014 to November 2018.
The tally shows the degree to which Mr. Rangel's extensive fund-raising operation — which includes a political action committee that he uses to support Democrats around the country — relies on the real estate sector as a base.
If other charities want to achieve the same ambition, they are likely to have to rely on extensive funding and donations, which will be a challenge for most third sector or small organisations.
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The groups must do extensive fund-raising from private sources and foundations.
Bijou's work received extensive funding from the National Institute of Mental Health, the U.S. Office of Education, and the National Institute of Child Health and Human Development.
