whole tone vs whole step

whole tone and whole step both are nouns.

Word	Noun	Adjective	Verb	Adverb
whole tone	Yes	No	No	No
whole step	Yes	No	No	No

As nouns, whole tone and whole step are synonyms defined as:

Other synonyms of whole tone include step, tone.

whole tone (noun)	whole step (noun)
a musical interval of two semitones	a musical interval of two semitones