They are pronounced exactly the same. 'Aide" can only be used as a noun and it means an assistant; usually an assistant to someone of a higher office. "Aid" can be a noun or a verb: Noun: 1: a subsidy granted to the king by the English parliament until the 18th century for an extraordinary purpose 2a : the act of helping b : help given : assistance <providing aid and comfort>; specifically : tangible means of assistance (as money or supplies) 3a : an assisting person or group — compare aide b : something by which assistance is given : an assisting device <an aid to understanding> <a visual aid>; especially : hearing aid 4: a tribute paid by a vassal to his lord Examples of AID (N) The project was completed with the aid of several students. The work was done with the aid of a computer. The government has given millions of dollars in economic aid to these nations. She applied for financial aid in order to go to college. The diagram is provided as an aid to understanding. The computer is an aid to keeping costs down. He teaches art with visual aids. Verb: transitive verb : to provide with what is useful or necessary in achieving an end intransitive verb : to give assistance Examples of AID (V) They gave money in order to aid the cause. She aided them in their efforts. He jumped into the water to aid the drowning child. a home run that was aided by the wind She aided the government in the attempt to fight illiteracy. The definitions came from Merriam-Webster online: http://www.merriam-webster.com/dictionary/aid

They are pronounced the same way. Silent "e" on word aide makes pronunciation exactly same as aid.

Their pronunciations are the same: [eɪd]