unflustered vs unperturbed

unflustered and unperturbed both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unflustered	No	Yes	No	No
unperturbed	No	Yes	No	No

As adjectives, unflustered and unperturbed are synonyms defined as:

unflustered and unperturbed: free from emotional agitation or nervous tension

Other synonyms of unflustered include unflurried, unruffled.

unflustered (adjective)	unperturbed (adjective)
free from emotional agitation or nervous tension	free from emotional agitation or nervous tension