Synonyms of invasion in English:

occupation, conquering, capture, seizure, annexation, annexing, takeover, appropriation, expropriation, arrogation

overrunning, overwhelming, storming

attack, incursion, offensive, assailing, assault, onslaught

foray, sortie, raid

influx, inundation, inrush, rush, flood, torrent, deluge, stream, avalanche

violation, infringement, interruption, disturbance, disruption, breach, infraction

intrusion into, encroachment on, trespass on, obtrusion into, interference with