Answer: collide

AnswerCrossword Clue
COLLIDE

Make an impact

COLLIDE

Crash together

COLLIDE

Crash or clash

COLLIDE
Hit hard
COLLIDE
"When Worlds...": 1951 Sci-fi film
COLLIDEConflict
COLLIDECrash
COLLIDEClash.
COLLIDECrash.
COLLIDEMeet head-on.
COLLIDEClash
COLLIDEDisagree strongly
COLLIDECome together, in a way