collide

As a verb collide

is to impact directly, especially if violent.

As a noun eruption is

eruption.

As verbs the difference between confront and collide

is that confront is to stand or meet facing, especially in competition, hostility or defiance; to come face to face with; to oppose; to challenge while collide is to impact directly, especially if violent.

As verbs the difference between merge and collide

is that merge is to combine into a whole while collide is to impact directly, especially if violent.

As a noun merge

is a joining together of two flows.

As a verb collide

is to impact directly, especially if violent.

As an adjective undefined is

lacking a definition or value.

As verbs the difference between collide and struck

is that collide is to impact directly, especially if violent while struck is (strike) (delete).

As verbs the difference between attack and collide

is that attack is to apply violent force to someone or something while collide is to impact directly, especially if violent.

As a noun attack

is an attempt to cause damage or injury to, or to somehow detract from the worth or credibility of, a person, position, idea, object, or thing, by physical, verbal, emotional, or other assault.

As verbs the difference between collide and contradict

is that collide is to impact directly, especially if violent while contradict is (obsolete) to speak against; to forbid.

As verbs the difference between decide and collide

is that decide is while collide is to impact directly, especially if violent.

As verbs the difference between slam and collide

is that slam is (ergative) to shut with sudden force so as to produce a shock and noise or slam can be (card games) to defeat by winning all the tricks of a deal or a hand while collide is to impact directly, especially if violent.

As a noun slam

is (countable) a sudden impact or blow or slam can be (obsolete) a type of card game, also called ruff and honours.