melody vs tonal pattern

melody and tonal pattern both are nouns.

Word	Noun	Adjective	Verb	Adverb
melody	Yes	No	No	No
tonal pattern	Yes	No	No	No

As nouns, melody and tonal pattern are synonyms defined as:

melody and tonal pattern: the perception of pleasant arrangements of musical notes

melody (noun)	tonal pattern (noun)
the perception of pleasant arrangements of musical notes	the perception of pleasant arrangements of musical notes
a succession of notes forming a distinctive sequence