How does “importance” differ from “import” in context? Does this mean that, at least in Middle English, most verbs could be used as nouns without needing a suffix?

..., because suffering, injustice, cruelty and the welfare of society were matters of sacred import.

Question

How does “importance” differ from “import” in context? Does this mean that, at least in Middle English, most verbs could be used as nouns without needing a suffix?
 
..., because suffering, injustice, cruelty and the welfare of society were matters of sacred import.

Answer

I believe they mean the same thing, but using IMPORT this way is antiquated.