As adjectives the difference between nontonic and nontoxic
is that nontonic is (music) not tonic while nontoxic is not toxic, or poisonous.
nontonic
English
Adjective
(-)
(music) not tonic nontoxic
English
Alternative forms
* non-toxic
Adjective
(-)
Not toxic, or poisonous.
Synonyms
* harmless
* innocuous
* nonpoisonous
Antonyms
* toxic
* harmful
* nocuous
* poisonous