IPA: /ˈkʌpəldəm/
KK: /ˈkʌpəldəm/
The condition or situation of being in a romantic relationship with someone.
After years of dating, they finally embraced coupledom and decided to get married.
Coupledom is formed from "couple" (from Old French *cople*, meaning a pair or two) and "-dom" (meaning state or condition). The word "coupledom" refers to the state or condition of being a couple.
Think of a 'couple' as a pair of people, and '-dom' indicating a state or condition. This helps you remember that 'coupledom' means the state of being a couple.
No commonly confused words.