invader
//ɪnˈveɪdər//
Noun
invaderSingular
invadersPlural
1
A person or group that enters a place or territory by force, especially with hostile intent to conquer or occupy.
The invaders crossed the border and occupied the capital city.
2
An organism, especially a plant or animal species, that spreads into and disrupts a new environment where it is not native.
The invasive plant is a dangerous invader that threatens native species in the wetlands.