pattern - Woody words, tinny words

Note: There are some rude words in this question.

There's an implicit puzzle in posed in this classic Monty Python sketch (you can also ready the script online).

Various words are described as being 'woody' or 'tinny', and one is described as being 'PVC'.

Here are some woody words:

• Gorn (possibly Gone)


• Sausage


• Seemly


• Prodding


• Vacuum



• Bound


• Vole


• Caribou


• Intercourse


• Pert


• Thighs


• Botty


• Erogenous Zone


• Ocelot


• Wasp



• Yowling

Here are some tinny words:

• Litter bin


• Newspaper


• Antelope


• Recidivist


• Tit


• Simpkins

This one is PVC:

So here's the question, what makes a word woody, and what makes it tinny? or even PVC? I'd prefer some kind of rule which can be used to categorise words into one of these categories.

Here's some words to test your rule on, tell me which category they belong to and why?

• Guildford


• Godalming


• Artichoke


• Trigonometry



• Brigand


• Fox


• Bookworm


• Gaggle