friction vs clash

friction and clash both are nouns.

Word	Noun	Adjective	Verb	Adverb
friction	Yes	No	No	No
clash	Yes	No	Yes	No

As nouns, friction and clash are synonyms defined as:

friction (noun)	clash (noun)
effort expended in moving one object over another with pressure	a minor short-term fight
the resistance encountered when one body is moved in contact with another	a loud resonant repeating noise
a state of conflict between persons	a state of conflict between persons
	a state of conflict between colors

friction (verb)	clash (verb)
	disagree violently
	crash together with violent impact
	be incompatible; be or come into conflict