fear and uncertainty about the future

worry, tension

anxiety (the more usual word)

worry; mental upset

(a cause of) great pain, discomfort or sorrow

pain, agony

the unpleasant feeling caused by the nearness or possibility of danger or evil

alarm, apprehension

the absence of patience

inability, unwillingness to wait

any (usually unpleasant) sound, especially a loud one

sound that is loud or not harmonious

a vague feeling that something (especially unpleasant or undesirable) is about to happen

anticipation, expectation

concern or anxiety

worry, anxiety

(an instance of) serious trouble, confusion

turmoil

disquiet

disquiet