import vs lesson

import and lesson both are nouns.

Word	Noun	Adjective	Verb	Adverb
import	Yes	No	Yes	No
lesson	Yes	No	No	No

As nouns, lesson is a hyponym of import; that is, lesson is a word with a more specific, narrower meaning than import:

import (noun)	lesson (noun)
commodities (goods or services) bought from a foreign country	a task assigned for individual study
having important effects or influence	a unit of instruction
a meaning that is not expressly stated but can be inferred	punishment intended as a warning to others
the message that is intended or expressed or signified	the significance of a story or event
an imported person brought from a foreign country

import (verb)	lesson (verb)
indicate or signify
bring in from abroad
transfer (electronic data) into a database or document