amplitude
antagonism
antinode
antipathy
arrest
arrestation
arrestment
atmospherics
backlash
blaring
blasting
blind spot
block
blockage
blocking
check
clashing
clogging
closing up
closure
collision
conflict
confutation
constriction
contradiction
contraposition
contrariety
counteraction
counterposition
counterworking
cramp
crankiness
crawling
creeping
crest
crotchetiness
de Broglie wave
delay
detainment
detention
difficulty
diffraction
dissent
drift
electromagnetic radiation
electromagnetic wave
encroachment
encumbrance
entrance
entrenchment
foreign policy
action
advice
assistance
conduct
criticism
disturbance
exertion
hostility
influence
injury
interruption
intervention
intrusion
invasion
legislation
opposition
restraint
tyranny
violence
adherence
appearance
clearance
coherence
disappearance
incoherence
noninterference
perseverance
reappearance
non-interference