Word Study
-dom
OXFORD DICTIONARY
-dom, suffix forming nouns denoting:
1 state or condition (freedom).
2 rank or status (earldom).
3 domain (kingdom).
4 a class of people (or the attitudes etc. associated with them) regarded collectively (officialdom).
1 state or condition (freedom).
2 rank or status (earldom).
3 domain (kingdom).
4 a class of people (or the attitudes etc. associated with them) regarded collectively (officialdom).
Etymology
OE -dom, orig. = DOOM
For further exploring for "-dom" in Webster Dictionary Online