morphology vs sound structure

morphology and sound structure both are nouns.

Word	Noun	Adjective	Verb	Adverb
morphology	Yes	No	No	No
sound structure	Yes	No	No	No

As nouns, morphology and sound structure are synonyms defined as:

morphology and sound structure: the admissible arrangement of sounds in words

Other synonyms of morphology include syllable structure, word structure.

morphology (noun)	sound structure (noun)
the branch of biology that deals with the structure of animals and plants	the admissible arrangement of sounds in words
studies of the rules for forming admissible words
the admissible arrangement of sounds in words
the branch of geology that studies the characteristics and configuration and evolution of rocks and land forms