paradiddle vs drum roll

paradiddle and drum roll both are nouns.

Word	Noun	Adjective	Verb	Adverb
paradiddle	Yes	No	No	No
drum roll	Yes	No	No	No

As nouns, paradiddle and drum roll are synonyms defined as:

paradiddle and drum roll: the sound of a drum (especially a snare drum) beaten rapidly and continuously

Other synonyms of paradiddle include roll.

paradiddle (noun)	drum roll (noun)
the sound of a drum (especially a snare drum) beaten rapidly and continuously	the sound of a drum (especially a snare drum) beaten rapidly and continuously