Nouns

(n)concern, worry, headache, vexationsomething or someone that causes anxiety; a source of unhappiness“New York traffic is a constant concern”, “it's a major worry”
(n)worry, troublea strong feeling of anxiety“his worry over the prospect of being fired”, “it is not work but worry that kills”, “he wanted to die and end his troubles”

Verbs

(v)worrybe worried, concerned, anxious, troubled, or uneasy“I worry about my job”
(v)worry, carebe concerned with“I worry about my grades”
(v)worry, vexdisturb the peace of mind of; afflict with mental agitation or distress“I cannot sleep — my daughter's health is worrying me”
(v)concern, interest, occupy, worrybe on the mind of“I worry about the second Germanic consonant shift”
(v)worrylacerate by biting“the dog worried his bone”
(v)worrytouch or rub constantly“The old man worried his beads”