Killjoys

5 clues
Spoilers
Grouches
Spoilsports
Party poopers
Wet blankets?
Similar answers:
Addressedtokill
Akill
Akillingfrost
Askillfulswimmer
Atimetokill
Aviewtoakill
Basicskills
Buzzkill
Castironskill
Castironskillet
Catskill
Catskillnewyork
Catskills
Cerealkiller
Chainkiller
Clairemccaskill
Cortezthekiller
Cuppingskills
Curiositykilledthedog
Defaceofakiller