tonic key vs tonality

tonic key and tonality both are nouns.

Word	Noun	Adjective	Verb	Adverb
tonic key	Yes	No	No	No
tonality	Yes	No	No	No

As nouns, tonality is a hypernym of tonic key; that is, tonality is a word with a broader meaning than tonic key:

tonic key: the basic key in which a piece of music is written
tonality: any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music

Other hypernyms of tonic key include key.

tonic key (noun)	tonality (noun)
the basic key in which a piece of music is written	any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music