baby talk vs babytalk

baby talk and babytalk both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby talk	Yes	No	No	No
babytalk	Yes	No	No	No

As nouns, baby talk and babytalk are synonyms defined as:

As nouns, baby talk and babytalk are synonyms defined as:

baby talk and babytalk: an adult's imitation of the speech of a young child

Other synonyms of baby talk include motherese.

baby talk (noun)	babytalk (noun)
the developing speech of a young child	the developing speech of a young child
an adult's imitation of the speech of a young child	an adult's imitation of the speech of a young child