depreciation vs unwelcome guest

depreciation and unwelcome guest both are nouns.

Word	Noun	Adjective	Verb	Adverb
depreciation	Yes	No	No	No
unwelcome guest	Yes	No	No	No

depreciation (noun)	unwelcome guest (noun)
a decrease in price or value	someone who gets in (to a party) without an invitation or without paying
a communication that belittles somebody or something
decrease in value of an asset due to obsolescence or use