What's the difference between "tire" and "tiresome"?
tiresome tire
troublesome trouble

Question

What's the difference between "tire" and "tiresome"?
tiresome  tire
troublesome  trouble

Answer

'Tire' is a verb; 'tiresome' is an adjective.
"This film is tiresome.  It tires me just to look at it."
'Trouble' can either be a verb or noun.
"Can I trouble you for a favor?" (verb)
"I see trouble ahead for this firm." (noun)
'Troublesome' is an adjective.
"The thought of being fired was extremely troublesome to him."