First off, I'd like to make clear that I appreciate the existence of this thread and the discussion it promotes, but it also happens to strike a particular pet peeve mine, being: it tells people that a common misconception is wrong but then doesn't provide the correction.
For those who don't know and have gone this far without looking it up themselves - "envy" is having the desire for something that is not yours while "jealousy" is the fear that someone else will take something you have.
As far as I'm concerned with its usage, it does jump out at me when I notice it as "technically wrong," but the descriptivist in me says people have been treating these words as synonymous for so long, it really shouldn't be something to get hung up on. Like how "decimate" technically means "reduce by 1/10th" but if you were to correct someone who uses it as a synonym for "destroy," you really just come off as someone saying "Hey guys, I'm smart and know things!"
I was also kinda hoping for discussion on more than just words that are spelled similarly or can just be simple typos, but another pair of words that I think is applicable would be "asocial" and "anti-social."
I've seen this more commonly in casual conversation than actual writing, but "asocial" is an avoidance of social situations while "anti-social" is active antagonism towards society (see "Anti-Social Personality Disorder," which is the currently proper term for what used to be referred to as "sociopathy" or "psychopathy"). I see this regularly when people describe introverted or shy people and say "Oh, they're anti-social, they don't talk to anyone" which I fear could be more harmful than the regular old "People are using words wrong" because this could actually lead to people being perceived in a way that they aren't.
Granted, I have absolutely no evidence of this, but I feel like if the quiet, asocial kid gets the label of "anti-social" and then other people learn that "Anti-social behavior" is a symptom of sociopathy, then the "quiet kid" eventually gets mischaracterized as "future school shooter."