Dominicus vs Sunday

Dominicus and Sunday both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dominicus	Yes	No	No	No
Sunday	Yes	No	No	No

As nouns, Dominicus and Sunday are synonyms defined as:

Dominicus and Sunday: first day of the week; observed as a day of rest and worship by most Christians

Other synonyms of Dominicus include Lord's Day, Sun.

Dominicus (noun)	Sunday (noun)
first day of the week; observed as a day of rest and worship by most Christians	United States evangelist (1862-1935)
	first day of the week; observed as a day of rest and worship by most Christians