I promised you my List so far. Here it is:
Anna Airy (1882 - 1964) British Artist. One of the first women to be commissioned as a war artist
Mildred Aldrich (1853 - 1928) America writer. Lived in Paris for 16 years prior to WW1, retired to the Marne in July 1914 and wrote about her "Little House on The Marne" in the early days of the war.
Clare Atwood (1866 - 1962) British Artist
Gertrude Bell - British spy
Lady Blomfield (1859 - 1939) born Ireland
Maria Bochkareva - Russian woman soldier - recruited over 2,000 women into the Russian Army
Mary Booth (1869 - 1956) - Australian Pyhsician and Welfare Worker
Maude Bruce - forewoman at Munitions Factory in Gretna, awarded medal for extreme bravery
Lady Elizabeth Butler (b. 1846) - military artist/illustrator - sister of Alice Meynell the poet
The Dick Kerr's Ladies Football Team - Dick Kerr's Factory, Preston - raised large sums of money for the war effort by playing football, organising matches after their factory shifts were over
Dora Carrington - artist
Edith Cavell - British nurse shot as a spy for helping British soldiers to escape after the early battles of the War
Dorothy J. Coke - artist
Maria Corelli (1855 - 1924) - British novelist who sold more books than Conan Doyle, Wells and Kipling combined; 9 films were made of her novels
Dorothy Crewdson (b. 1886) - British nurse
Marie Curie - created mobile radiography units for use in WW1
Margaret Damar Dawson - woman police officer in munitions factory
Janet Daniels - Munitions factory worker - awarded medal for extreme bravery
Joyce Dennys (1893 - 1991) - served as a VAD in Cornwall - War Artist for the "Daily Sketch"
Jessica Dismorr (1885 - 1939) - British painter/illustrator (Vorticist Movement) served as a VAD, nursing in France
Olive Edis (1876 - 1955) - Fellow of the Royal Photographic Society 1914 - Official War artist
Helen Fairchild (died 7th July 1917) - American - assigned to duty as a nurse in France 7th July 1917, died 18th January 1918
Elsie Mabel Gladstone - British nurse, killed in WW1 (buried Belgrade Cemetery, Namur, Belgium)
Norah Neilso Gray (1882 - 1931) - war artist
Margaret Haig Thomas (1883 - 1958) - Welsh - saved with her Father from the Lusitania
Mary Riter Hamilton - Canadian artist who went to paint the Aftermath in Flanders
Zora Neale Hurston (1891 - 1960) - American writer
Dr. Elsie Inglis (1864 - 1917) - Scottish doctor and suffragist; founded Scottish Women's Hospitals for Foreign Service in WW1 (France, Serbia and Russia) and went to Serbia to run a hospital
Elsie Janis - American entertainer who went to entertain the troops in France/Belgium
Gwen John - War Artist
M. Jones - nurse - described air raids in Salonika
Lucy Elizabeth Kemp-Welch (1869 - 1958) - military artist
Bahiyyih Khanum (1846 - 1932) daughter of the founder of the Baha'i Faith - imprisoned in 1867 at the age of 21 and freed in 1980.
Olive May Kelson King (1885 - 1958) - Australian. Funded and drove ambulances in France and Serbia.
Dame Laura Knight (nee Johnson) - (1877 - 1970) - British war artist
Ellen La Motte - American nurse who wrote about her experiences in WW1
Dorothy Lawrence - British Journalist - enlisted in BEF Tunnelling Company as Denis Smith in 1915
Flora Lion (1878 - 1958) - British artist commissioned by Ministry of Information to paint factory scenes
Elizabeth Lucas (wife of poet E.V. Lucas) - founded a children's home behind the lines in France WW1
Misstanguett - (1875 - 1956) French entertainer and spy WW1
Olive Mudie-Cooke - British artist - drove ambulances in France and Italy WW1
Rose O'Neil (1874 - 1944) - American sculptor, suffragist, inventor, novelist, poet, musician, creator of Kewpie dolls
Gabrielle Petit (1893 - 1916) - Belgian spy - executed
Ellie Annie Rout (1877 - 1936) - New Zealand - pioneer in sexual transmitted diseases in WW1
Helen Saunders - artist
Kathleen Scott ((1878 - 1947) - sculptor. Wife of the explorer Captain Scott of the Antarctic (later Baroness Kennet). Among other things, she worked on innovative plastic surgery treatments WW1
Nellie Spindler - British nurse killed i WW1 on the Western Front (buried Lijssenthoek Military Cemetery, Belgium)
Mabel Annie St Clair Stobart (1862 - 1954) Founder of The Women's Sick and Wounded Convoy Corps who organised hospitals in France and Belgium for St. John's Ambulance in WW1
Elizabeth Ann Slater Weaver (1878 - 1956) - housewife/weaver who lived in Burnley, Lancashire
Bertha (Betty) Stevenson (1896 - 1918) - British - YMCA volunteer killed in the line of duty May 1918 and buried with full military honours in Etaples Military Cemetery
Mrs Mary Humphrey Ward (1851 - 1920) - first woman journalist to visit the Western Front trenches
Maria Yurlova - Armenian Cossack Soldier
Clara Zetkin - Founder of International Women's Movement
As my research continues I am certain to find many more women to include. Please feel free to let me know of any I have missed so far.