Milimeter and kilometer
To determine which word is written correctly, please provide the specific words you want to compare. Without that information, I can't identify the correctly spelled word.
Milimeter centimeter
All of the words in the question are spelled correctly. The 11-letter word that is most often spelled incorrectly is...incorrectly.
Two. You wrote it correctly. It is not a compound word.
measurements
Meter stick is two words. I used to think that its one word, but according to Microsoft word its not :)
A phonetically spelled word is when you spell it the way it sounds. For example, "through" would be "thru". A correctly spelled word is when it is spelled as it is found in the dictionary.
Centimeter, decanters, decimeter, meter, kilometer, hectometer, millimeter
The word "conveyed" is spelled correctly. The other words should be spelled as "spied," "defied," and "ferried."
Cell phone for sale! 4 words, a sentence using the word cell phone.
No, you have spelled letterhead correctly as one word.
The likely word is "properly" (correctly), as there are few words close in spelling.