worrywart vs wet blanket

worrywart and wet blanket both are nouns.

Word	Noun	Adjective	Verb	Adverb
worrywart	Yes	No	No	No
wet blanket	Yes	No	No	No

As nouns, wet blanket is a hypernym of worrywart; that is, wet blanket is a word with a broader meaning than worrywart:

Other hypernyms of worrywart include killjoy, party pooper, spoilsport.

worrywart (noun)	wet blanket (noun)
thinks about unfortunate things that might happen	someone who spoils the pleasure of others