dissimilate vs dissimilation

dissimilate is not a noun while dissimilation is a noun.

Word	Noun	Adjective	Verb	Adverb
dissimilate	No	No	Yes	No
dissimilation	Yes	No	No	No

dissimilate (noun)	dissimilation (noun)
	breakdown in living organisms of more complex substances into simpler ones together with release of energy
	a linguistic process by which one of two similar sounds in a word becomes less like the other

dissimilate (verb)	dissimilation (verb)
become dissimilar or less similar
make dissimilar; cause to become less similar
become dissimilar by changing the sound qualities