yes it is, need proof look on this link... http://thesaurus.reference.com/browse/difficult
difficult, hard, laborious, tough
difficult, trying, hard, taxing, wearing, challenging, tough, exacting
A synonym of difficult is arduous.
difficult
difficult
Hard ! :)
Chuck Norris...http://www.chucknorrisfacts.com/
No, those words are not synonymous. Tough means strong and durable, different means not alike.
firm, solid, stiff, tough, durable etc
hoodlum, tough, gorilla, goon, hood
A synonym for extremely difficult question can be exceptionally tricky problem requiring an answer.
light, rough, difficult , lifted