A few more pieces (I presume you didn't just been songs - sung by singers) for you written 1914-18:
Bartók - Romanian Folk Dances (1917); Ballet: 'The Wooden Prince' (1914-17)
Bax - 'The Garden of Fand' (1916); November Woods (1917)
Berg - Three Pieces for Orchestra (finished in 1915)
Delius - North Country Sketches (1914); Dance Rhapsody (1916); String Quartet (1916); Double Concerto for Violin and Cello (1915-16); Requiem (1914-16); Eventyr (1917); A Song Before Sunrise (1918)
Elgar - String Quartet (1918)
Enescu - Symphony No 3 (1918)
Falla - El amor brujo (Love, the Magician [The Love Sorcerer])(1915)
Grainger - The Warriors (1916)
Griffes - The Pleasure-Dome of Kubla Khan (1917)
Holst - The Planets (1916)
Janáček - The Excursions of Mr Brouček (1917)
Myaskovsky - Symphonies 3-5 (1914-18)
Nielsen - Symphony No 4 (Inextinguishable)(1916)
Prokofiev - Scythian Suite (1914-16)
Puccini - Il trittico (1918)
Rakhmaninov - Vespers (1915); Etudes-tableaux (1916)
Sibelius - Symphony No 5 (1915); The Oceanides (1914)
Stenhammar - Symphony No 2 (1915)
Strauss - Alpine Symphony (1915); Le bourgeois gentilhomme (1918)
Stravinsky - Rénard (1916); The Song of the Nightingale (1917); Ragtime (1917-18); The Soldier's Tale (1918)
Szymanowski - Symphony No 3 (Song of the Night)(1916); Violin Concerto No 1 (1916)
Vaughan Williams - The Lark Ascending (1914)