Alveoli.
Abnormal, starts with "ab" and ends in "al"
bestial bipedal bifocal
conceal
earth, each, that's al i can think of...
Musical
Jariyan al Batnah is a municipality in Qatar
animal
There are a lot, the first one that comes to mind is "alive." Alone, aloft, aloof . . .
five letter words beginning with al: * alert * alarm * alter * alive * alike * aline * alude * altar
Alligator, Albatross.
Hypotenuse, Heptagon(al), Hexagon(al), Hectogram, Height.