ho-hum vs tedious

ho-hum and tedious both are adjectives.

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

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

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

ho-hum (adjective)	tedious (adjective)
so lacking in interest as to cause mental weariness	using or containing too many words
	so lacking in interest as to cause mental weariness