cenotaph

As nouns the difference between memorial and cenotaph

is that memorial is a structure, such as a monument, intended to celebrate the memory of a person or event while cenotaph is a monument erected to honour the dead whose bodies lie elsewhere; especially members of the armed forces who died in battle.

As an adjective memorial

is serving as a remembrance of someone or something; commemorative.

As nouns the difference between cenotaph and cenotaphy

is that cenotaph is a monument erected to honour the dead whose bodies lie elsewhere; especially members of the armed forces who died in battle while cenotaphy is a cenotaph.