unuttered vs unspoken

unuttered and unspoken both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unuttered	No	Yes	No	No
unspoken	No	Yes	No	No

As adjectives, unuttered and unspoken are synonyms defined as:

Other synonyms of unuttered include unexpressed, unsaid, unstated, unverbalised, unverbalized, unvoiced.

unuttered (adjective)	unspoken (adjective)
not made explicit	not made explicit
	expressed without speech