friction (n.)
- abrasion
- animosity
- antagonism
- antipathy
- argument
- attrition
- backlash
- belligerence
- bickering
- caressing
- chafing
- clash
- collision
- competition
- conflict
- confutation
- contention
- contradiction
- contrariety
- contrariness
- controversy
- counteraction
- crankiness
- crotchetiness
- disagreement
- discord
- discordance
- disharmony
- dispute
- dissension
- dissent
- enmity
- erosion
- feeling
- fingering
- fractiousness
- fricative
- frottage
- grating
- handling
- hate
- hatred
- hostility
- incompatibility
- inharmoniousness
- interference
- jangle
- jar
- kick
- malevolence
- malice
- malignity
- manipulation
- mischief
- negativeness
- nonconformity
- obstinacy
- opposition
- palpation
- perverseness
- petting
- pressure
- quarrelsomeness
- reaction
- recalcitrance
- recoil
- refractoriness
- repercussion
- repugnance
- resistance
- revolt
- rivalry
- rub
- rubbing
- scraping
- spite
- spitefulness
- strife
- stroking
- tension
- touching
- unpleasantness
- wrangling
