wearing vs exhausting

wearing is a noun but exhausting is not a noun.

Word	Noun	Adjective	Verb	Adverb
wearing	Yes	Yes	No	No
exhausting	No	Yes	No	No

As adjectives, wearing and exhausting are synonyms defined as:

Other synonyms of wearing include tiring, wearying.

wearing (noun)	exhausting (noun)
the act of having on your person as a covering or adornment
(geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively

wearing (adjective)	exhausting (adjective)
producing exhaustion	having a debilitating effect
	producing exhaustion