Words that start with 'oi' and contain 't'

Which word that starts with 'oi' and includes 't' is the most unique?
Our team feel 'oilcloth' to be the most strange word you can construct. The definition of 'oilcloth' is as follows: "Cloth treated with oil or paint, and used for marking garments, covering flooors, etc.".

In Scrabble, what's the highest possible score you can get from words that start with 'oi' and include 't'?
For 14 points, one can play 'oilstock'.

What is the most popular word that starts with 'oi' and includes 't'?
When it comes to well-known words, there's 'ointment' which is the 27368^th most popular word.

In total, how many words is it possible to make using the combination of letters requested?
You could derive 25 words using the specified combination.

What's the largest word you can derive with the combination specified?
The longest word assembled by Dictionarypedia is 'oidiomycotic'.