Collocations for relaxed - adj.

appear, be, feel, look, seem
keep sb

extremely, fairly, very, etc.
deeply
completely, perfectly, totally
apparently, seemingly
visibly
enough
You need to ensure that a patient feels relaxed enough to discuss things fully.

about
I was very relaxed about the decision.

Relaxed is used with these nouns:
atmosphere, attitude, fashion, manner, mood, muscle, pace, stance