clash vs friction

clash and friction both are nouns.

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

As nouns, clash and friction are synonyms defined as:

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

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