prophet of doom

worrywart

doomsayer kill-joy

complainer dampener grouch moaner pessimist whiner

doomsdayer grinch partypooper stick in the mud wet blanket

cynic

complainer defeatist downer killjoy misanthrope sourpuss

gloomy party pooper wet blanket

cynic worrier

complainer defeatist depreciator downer killjoy misanthrope sourpuss worrywart

crepehanger gloomy party pooper wet blanket

optimist