rubeola vs measles

rubeola and measles both are nouns.

Word	Noun	Adjective	Verb	Adverb
rubeola	Yes	No	No	No
measles	Yes	No	No	No

As nouns, rubeola and measles are synonyms defined as:

rubeola and measles: an acute and highly contagious viral disease marked by distinct red spots followed by a rash; occurs primarily in children

Other synonyms of rubeola include morbilli.

rubeola (noun)	measles (noun)
an acute and highly contagious viral disease marked by distinct red spots followed by a rash; occurs primarily in children	an acute and highly contagious viral disease marked by distinct red spots followed by a rash; occurs primarily in children