"immense appetite" is a correct and usable phrase in written English.
It means a very large or strong desire for food or something else. Example: The smell of the freshly baked cookies awakened my immense appetite.
The first modern artists had an immense appetite for visual luxury.
I have found only one way of completely satisfying this immense appetite for emotion, and this is music".
Many attributed these qualities, as well as his immense appetite for work, to his untypical (for a company chairman of that era) background.
In a way, the oversize plot is a reflection of its protagonist, Assistant Superintendent David Bengu of the Botswana police, whose great girth and immense appetite account for his nickname, Kubu, the Setswana word for hippopotamus.
In addition to playing baseball he is a professional organist and has an immense appetite for celebrity, a hunger for big money, and hopes of a profitable winter career in the night clubs.
The production team, led by director Madani Younis, have created a symphony of voices in which the experiences of local wool-workers intertwine with the army of migrant workers who came to satisfy the mill's immense appetite for labour.
Some Internet service providers say they want to end their all-you-can-eat plans because a few customers with immense appetites for Web content are overwhelming the networks and slowing the delivery of news and entertainment for everyone else.
Painters and poets, journalists, antiquarians, interior designers and architects all fed the immense popular appetite for things conventionally oriental.
Beard, who we are encouraged to believe won a Nobel prize in physics as a young man for something called the Beard-Einstein Conflation, is a short, fat, balding, much-married man of immense bodily appetites and scant self-discipline.
He had run up immense debts to feed his appetite for building monuments to himself and armed forces all out of proportion to any conceivable regional needs, and he was clearly an enormous threat to the oil supply of the world's industrialized nations.
She regards the war as an agapemone (a place where free love is practised), and as "an immense warlock's carnival of appetites, lusts, ebrieties".
