importing vs importation

importing and importation both are nouns.

Word	Noun	Adjective	Verb	Adverb
importing	Yes	No	No	No
importation	Yes	No	No	No

As nouns, importing and importation are synonyms defined as:

importing and importation: the commercial activity of buying and bringing in goods from a foreign country

importing (noun)	importation (noun)
the commercial activity of buying and bringing in goods from a foreign country	the commercial activity of buying and bringing in goods from a foreign country
	commodities (goods or services) bought from a foreign country