unafraid vs untroubled

unafraid and untroubled both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unafraid	No	Yes	No	No
untroubled	No	Yes	No	No

As adjectives, unafraid and untroubled are synonyms defined as:

Other synonyms of unafraid include secure.

unafraid (adjective)	untroubled (adjective)
oblivious of dangers or perils or calmly resolute in facing them	not beset by troubles or disturbance or distress
free from fear or doubt; easy in mind	free from fear or doubt; easy in mind
	free from turmoil or worries