irksome vs wearisome

irksome and wearisome both are adjectives.

Word	Noun	Adjective	Verb	Adverb
irksome	No	Yes	No	No
wearisome	No	Yes	No	No

As adjectives, irksome and wearisome are synonyms defined as:

irksome and wearisome: so lacking in interest as to cause mental weariness

Other synonyms of irksome include boring, deadening, dull, ho-hum, slow, tedious, tiresome.

irksome (adjective)	wearisome (adjective)
so lacking in interest as to cause mental weariness	so lacking in interest as to cause mental weariness