wearisome vs irksome

wearisome and irksome both are adjectives.

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

As adjectives, wearisome and irksome are synonyms defined as:

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

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

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