Find 3 066 synonyms for Difficult to improve your writing and expand your vocabulary. Find different ways to say difficult in British and American English with Collins Thesaurus. Browse synonyms for hard, problematical, troublesome, tough, and more. The words arduous and hard are common synonyms of difficult. While all three words mean "demanding great exertion or effort," difficult implies the presence of obstacles to be surmounted or puzzles to be resolved and suggests the need of skill or courage. Find synonyms and antonyms for difficult , such as hard, tough, taxing, demanding, challenging, problematic, arduous, onerous, and more. Compare different sources and examples of usage for each word.