If you're talking about the plural of the vehicle used for mass transport, then the word is 'buses'.

“Sale” is a noun. “Sell” is a verb. An example of using both being “This item is on sale! I am selling it for 10 dollars!” So the sell price of the sale is 10 dollars.

"Less" is used with uncountable nouns such as "salt," "sand," "water," etc. Things that you would measure with a measuring cup, or quantify by weight, rather than using a number. "Fewer" is used with things that you would count-- "people," "pets," "pens," "pots." In other words, "less" means "a smaller quantity of," while "fewer" means "a smaller number of."

Aluminum became the more popular name in American English, and aluminium became the more popular name in British English. These preferences are still common today, but most chemistry organizations recognize both terms as acceptable.

A hypothesis is an untested (but testable) proposal. A theory is a proposal that has been tested. Hypothesis: I think that.. Theory: Research has proven that..