Worry
Part of speech: noun
Definition: A strong feeling of anxiety. An instance or cause of such a feeling.
Part of speech: verb
Definition: To seize or shake by the throat, especially of a dog or wolf. To harass; to irritate or distress. Disturb the peace of mind of; afflict with mental agitation or distress. To be troubled, to give way to mental anxiety. To strangle.
Example sentence: Forget the past - the future will give you plenty to worry about.
Trouble
Part of speech: noun
Definition: A distressful or dangerous situation.A difficulty contributing to such a situationEfforts taken.A malfunction, as in "heart trouble".A violent occurrence.
Part of speech: verb
Definition: To bother; to annoy.
Example sentence: If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month.