Another troublesome pair from near the end of the alphabet – and while we’re talking about alphabets, I’ll admit now (and sadly it will probably be true for any future readers, too; you’ll be amazed how many people search for these pairs years after I posted them) that I’m a bit behind with updating the index. However, if you use the Search feature (under menu on a mobile or in the right-hand column on a desktop) you will be able to find all of them.
OK, venal vs. venial.
If you are venal, it means you are susceptible to bribery, for example a corrupt politician or town planner.
Venial is quite different: it is used in a Christian context to describe a sin which is not seen as removing divine grace from the soul. It has therefore also come to mean, by extension, slight or pardonable, although I can’t personally recall seeing it used in this way in a non-religious context (or without any reference to religion) and I would advise using slight or pardonable instead if you want to use it in a secular context unless you’re very sure your audience will understand it.
Additional point: venial sins are contrasted with mortal sins, which are terrible, grave sins which do deprive the soul of divine grace.