raider, interloper, intruder, invasions, marauders, alien, colonizer, pests, africanized bee, aggressors, cicada killer, insect, adversary, oriental bittersweet, waterweed, stachys, wasp, chinch bug, knapweed, africanized honey bee, conqueror, speedwell, stink bug, plunderer, climbing fern, infestation, enemy, dandelion, barbarians, japonicus, whitefly, ridgling, garlic mustard, trespasser, carpenter bee, tobacco hornworm, toad, cockroach, bufo, tomato hornworm, death adder, ant, adelgid, apis mellifera, weevil, european corn borer, beetles, turf, chickweed, chestnut, xenophobe, louse, interloping, ladybird beetle, parasite, earwig, tanager, toadflax, ladybird, diamondback, northern snakehead, gopher snake, chigger, snail, nearctic, americanus, bullfrog, menaces, sparrow hawk, vermin, flea beetle, taunter, arthropod, knotweed, tussock moth, purple loosestrife, buckthorn, sandflies, shrike, webworm, bush honeysuckle, thistle, mantids, swallow wort, avenger, creature, woolly adelgid, carpenter ant, gelding, pillager, potato blight, vetch, zebra mussel, slayer, paperbark, bufo marinus, moth, chafer, oppressor, cankerworms, whitetop, invaders, conquerors, intruders, raiders, colonizers, aggressor, invasion, incursion, oppressors, interlopers, besiegers, conquest, plunderers

attila, big brother, fifth columnist, saboteur, scourge of god, scourge of the gods

encroacher