A:one, any.

Abandon: desert forsake leave give up entirely, cease depart leave undone discard relinquish surrender discontinue quit evacuate withdraw (Slang turn one's back on wash one one's hands of pull out on.)

Abase:bring down make lower make humble demote shame degrade reduce (Slang bust slam)

Abashed: ashamed embrassed confused bewildred humiliated mortifed disconcerted.
Abate: Reduce lessen put an end to stop do away with decrease curtail moderate.

Abbey: convent monastery nunnery cloisters. 

Abbot:monk friar.