1) Battle 2) Melee 1) Drill 2) Exercise 3) Gridiron interplay 4) Practice 5) Practice game 6) Practice playing 7) Practice session 8) Recitation 
see goalmouth scramble.
• (n.) The struggle in the rush lines after the ball is put in play. • (n.) Formerly, a skirmish; now, a general row or confused fight or struggle.
A practice game
(from the article `football, gridiron`) ...Two of Camp`s revisions in particular effectively created the gridiron game. The first, in 1880, further refined Harvard`s initial innovation, ...
Scrim'mage noun [ A corruption of skirmish . 'Sore scrymmishe .' Ld. Berners. ] [ Written also scrummage .] 1. Formerly, a skirmish; now, a general row or confused fight or struggle. 2. (Football) The struggle in the rush lines after the ball is put ...
see: play from scrimmage
The USS Scrimmage was an American Admirable Class minesweeper of 625 tons displacement launched in 1943. The USS Scrimmage was powered by diesel engines providing a top speed of 14.5 knots and carried a complement of 104. She was armed with one 3 inch dual-purpose gun and four 40 mm anti-aircraft guns.
[n] - practice play between a football team`s squads 2. [v] - practice play, in sports
The term used for an unofficial game of 5-on-5. Scrimmages are most often ran towards the end of practices and involve players on the same team competing against each other.