tiresome vs ho-hum

tiresome and ho-hum both are adjectives.

Word	Noun	Adjective	Verb	Adverb
tiresome	No	Yes	No	No
ho-hum	No	Yes	No	No

As adjectives, tiresome and ho-hum are synonyms defined as:

tiresome and ho-hum: so lacking in interest as to cause mental weariness

Other synonyms of tiresome include boring, deadening, dull, irksome, slow, tedious, wearisome.

tiresome (adjective)	ho-hum (adjective)
so lacking in interest as to cause mental weariness	so lacking in interest as to cause mental weariness