metrification vs metrication

metrification and metrication both are nouns.

Word	Noun	Adjective	Verb	Adverb
metrification	Yes	No	No	No
metrication	Yes	No	No	No

As nouns, metrification and metrication are synonyms defined as:

metrification and metrication: the act of changing from imperial units of measurement to metric units: meters, grams, seconds

metrification (noun)	metrication (noun)
the act of changing from imperial units of measurement to metric units: meters, grams, seconds	the act of changing from imperial units of measurement to metric units: meters, grams, seconds
writing a metrical composition (or the metrical structure of a composition)