runtime error vs run-time error

runtime error and run-time error both are nouns.

Word	Noun	Adjective	Verb	Adverb
runtime error	Yes	No	No	No
run-time error	Yes	No	No	No

As nouns, runtime error and run-time error are synonyms defined as:

runtime error and run-time error: an error in logic or arithmetic that must be detected at run time

Other synonyms of runtime error include semantic error.

runtime error (noun)	run-time error (noun)
an error in logic or arithmetic that must be detected at run time	an error in logic or arithmetic that must be detected at run time