Concern
Part of speech: verb
Definition: To be of importance to. To make somebody worried.
Part of speech: noun
Definition: That which affects one's welfare or happiness The expression of solicitude, anxiety, or compassion toward a thing or person. A business, firm or enterprise; a company.
Example sentence: I do not concern myself with gods and spirits either good or evil nor do I serve any.
Headache
Part of speech: noun
Definition: A pain or ache in the head.(figurative) A nuisance or unpleasant problem.
Example sentence: They would glue the wig to the front of my forehead, and after a while it would give me a headache.