This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The act of invading, especially the entrance of an armed force into a territory to conquer.

n. A large-scale onset of something injurious or harmful, such as a disease.

n. An intrusion or encroachment.

n. A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.

n. The entry of a large group into a new area.

n. The act of invading; the act of encroaching upon the rights or possessions of another; encroachment; trespass.

n. A warlike or hostile entrance into the possessions or domains of another; the incursion of an army for conquest or plunder.

n. The incoming or first attack of anything hurtful or pernicious.

n. The act of invading a country or territory as an enemy; hostile entrance or intrusion.

n. Hence A harmful incursion of any kind; an onset or attack, as of disease.

n. Infringement by intrusion; encroachment by entering into or taking away what belongs to another: as, an invasion of one's retirement or rights.

n. In phytogeography, the phenomenon of the movement of plants from an area of one character into one of a different character, and their colonization in the latter.

n. the act of invading; the act of an army that invades for conquest or plunder

n. any entry into an area not previously occupied

n. (pathology) the spread of pathogenic microorganisms or malignant cells to new sites in the body

"However, the real history is that al-Qaeda had no real foothold in Iraq until the U.S. invasion in 2003 – and that al-Qaeda's leadership saw its post-U. S.-invasion efforts there as a way to divert American forces so the terror group could rebuild its operations in Pakistan and Afghanistan."

retreat   

entrance    entering    spreading    spread   

invader    intervasion    invade   

pitch invasion    invasion stripes    British Invasion    invasion of privacy   

inroad    irruption    encroachment    trespass    intrusion    visitation    incursion    creagh    creach    raid   

Asian    Caucasian    Malaysian    abrasion    caucasian    equation    evasion    occasion    persuasion    suasion   

conquest    assault    raid    revolution    destruction    disaster    rebellion    expedition    conflict    warfare