import vs hell to pay

import and hell to pay both are nouns.

Word	Noun	Adjective	Verb	Adverb
import	Yes	No	Yes	No
hell to pay	Yes	No	No	No

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

Other hyponyms of import include matter.

import (noun)	hell to pay (noun)
commodities (goods or services) bought from a foreign country	dire consequences
having important effects or influence
a meaning that is not expressly stated but can be inferred
the message that is intended or expressed or signified
an imported person brought from a foreign country

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