intonation vs pitch contour

intonation and pitch contour both are nouns.

Word	Noun	Adjective	Verb	Adverb
intonation	Yes	No	No	No
pitch contour	Yes	No	No	No

As nouns, intonation and pitch contour are synonyms defined as:

Other synonyms of intonation include modulation.

intonation (noun)	pitch contour (noun)
the act of singing in a monotonous tone	rise and fall of the voice pitch
singing by a soloist of the opening piece of plainsong
the production of musical tones (by voice or instrument); especially the exactitude of the pitch relations
rise and fall of the voice pitch