impingement (n.)
- brunt
- brush
- bump
- cannon
- caress
- carom
- clash
- collision
- concussion
- contact
- contingence
- crack-up
- crash
- crunch
- encounter
- encroachment
- entrance
- entrenchment
- glance
- graze
- hammering
- impact
- imposition
- incursion
- infiltration
- influx
- infringement
- injection
- inroad
- insinuation
- interference
- interjection
- interposition
- interruption
- intervention
- intrusion
- invasion
- irruption
- jar
- jolt
- kiss
- meeting
- nudge
- onslaught
- osculation
- percussion
- ramming
- rub
- shock
- sideswipe
- smash
- smash-up
- smashing
- tangency
- thrusting
- touch
- touching
- trespass
