senile (adj.)

• aged
• aging
• ancient
• anile
• childish
• childlike
• crabbed
• debilitated
• decrepit
• doddering
• doddery
• doting
• dotty
• failing
• feeble
• fogyish
• forgetful
• fossilized
• infirm
• moth-eaten
• old
• palsied
• rickety
• rusty
• senescent
• shaky
• shattered
• shriveled
• simple
• stodgy
• stuffy
• timeworn
• tottering
• tottery
• weak
• withered
• wizened