One outstanding issue is that some words excluded on the basis of being a plural ending in 's', are not just nouns. The words in question have verb forms with the same spelling. A simple example is
star, which can either be a noun (namely, any of a huge number of objects of interest to astronomers), or a verb (namely, to be among the most important performers in a play, film or TV show). Consequently,
stars can either be a noun plural (as in "there are numerous bright stars in the constellation Orion"), or a verb form (as in "he stars in the new Broadway musical that's just opened"). The fun part being, of course, that the
verb form "stars" in that latter sentence, is third person singular.
Quite a few words that would readily come to mind to the regular players, are excluded on the basis that the verb forms have identical spelling to plural noun forms.
The problem we face here is that the website, and the associated database, are all maintained and run by one individual, and consequently, the manpower to implement the rococo bureaucracy that would be needed to solve this problem is lacking. Alan would need to be working something like 1,000 hour days to handle such issues, which of course, is not going to happen because it's a physical impossibility.
Handing the project over to a large number of developers is also a non-starter, because that option would require Alan to pony up for their salaries. Given that decent full stack developers command salaries of £50,000 per annum or more here in the UK, I suspect that even if Alan did have the multi million pound budget required to make this a reality, he has more important uses to put the money to.
So, unless Alan wins the lottery, or secures venture capital funding for such a project, we have to live with the site's quirks. Sometimes, the regulars exhibit some frustration over this, but at others, they admit that the quirks are part of the charm here.
Rather more irksome from my standpoint, is when I alight upon a word that's missing from the database, but that's another story entirely.