tra-la-la vs tra-la

tra-la-la and tra-la both are nouns.

Word	Noun	Adjective	Verb	Adverb
tra-la-la	Yes	No	No	No
tra-la	Yes	No	No	No

As nouns, tra-la-la and tra-la are synonyms defined as:

tra-la-la and tra-la: a set of nonsensical syllables used while humming a refrain

tra-la-la (noun)	tra-la (noun)
a set of nonsensical syllables used while humming a refrain	a set of nonsensical syllables used while humming a refrain