Double Letter L in American English
Both Ls pronounced - One in the preceding syllable - One with the following syllable
Allah Allen allergen illegitimate
Both Ls pronounced as one - Only with the preceding syllable
a cappella allegation allege allegiance allegory alleluia allergic allergy
alley allied alligator allocate allocution alloy allonym allspice
illegal Illinois illiterate illness illustrate      
Both Ls pronounced as one - Only with the following syllable
allay allegro alleviate alliance alliterate allogenic allot allow
allude allure allusion allusive alluvial ally ellipse illegible
illicit illuminate illogical illusion illusive illustrious illuviate  
Both Ls pronounced as one in the preceding syllable OR as one with the following syllable