| penetration(noun, act, attack, push, transport) |
| invasion(noun, attack, assault, flood, plague) |
| percolation(noun, passage) |
| permeation(noun, transport, flood, employment, passage) |
| incursion(noun, attack, raid, military, mission) |
| inroad(noun, attack, raid, military, mission) |
| intrusion(noun, ingress, insertion) |
| infusion(noun, mixture, passage) |
| insertion(noun, entrance, saturation, diffusion, seepage) |
| insinuation(noun, ingress, insertion) |
| seepage(noun, waste, entrance, saturation, diffusion) |
| entrance(noun, saturation, diffusion, seepage, ingress) |
| entry |
| import(noun, ingress) |
| ingress(noun, passage, entrance, saturation, diffusion) |
| interpenetration(passage, ingress, interposition) |
| irruption(noun, attack, raid, military, mission) |
| leakage |
| piercing(noun, adjective, stab, entrance, saturation) |
| access |