How many 2 letter words can you make from BISCUIT?

There are 7 valid 2-letter words that can be made from the letters BISCUIT, and the highest scoring is bi at 4 points.

7 2 letter words from biscuit

You can make 7 words of exactly 2 letters from BISCUIT. The highest scoring is bi at 4 points.

bi: a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals
it: the branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information
si: a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)
ti: a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
us: North American republic containing 50 states - 48 conterminous states in North America plus Alaska in northwest North America and the Hawaiian Islands in the Pacific Ocean; achieved independence in 1776