Think about every form you fill out. There is generally a box for "marital status" ALL of those would have to change.
Every law in every state, and the federal laws that mentioned married would have to be changed.
Every business form that says married/marital status would have to be changed.
I think that the government spends enough money on stupid things. I certainly don't want more stupid things added to the list simply because some can't share a WORD.
Operning marriage to same sex couples wouldn't require changing every law and form that mentions anything to do with marriage.