prenup

 https://www.google.com/search?q=prenup

nuptial

 https://www.google.com/search?q=nuptial

symptoms

 https://www.google.com/search?q=divorce+symptoms

counsel

 https://www.google.com/search?q=marriage+counsel

lock

 https://www.google.com/search?q=wedlock

Common-law

 https://www.google.com/search?q=Common-law+marriage