The correct spelling of the word meaning "arranged in a straight line" is actually "aligned". It is pronounced as /əˈlaɪnd/. The common misspelling "allineated" arises from confusion with similar-sounding words like "alienated" or "illin'". The spelling of "aligned" follows the English spelling rule of dropping the silent "e" at the end of a word and adding "-ed". The correct spelling of a word is important for clear communication and understanding, so it is always worth double-checking to avoid any confusion.