Adjektive
uncomfortable [ more uncomfortable ; most uncomfortable ]
troublesome [ more troublesome ; most troublesome ]
pesky [ peskier ; peskiest ]
inconvenient [ more inconvenient ; most inconvenient]
worrisome [ more worrisome ; most worrisome ]
harsh [ harsher ; harshest]
bothersome [ more bothersome ; most bothersome ]
bratty [ brattier/more bratty ; brattiest/most bratty ]
corrosive [ more corrosive ; most corrosive]
cumbersome [ more cumbersome ; most cumbersome]
painful [ more painful ; most painful]
...
Noun
pest [pl. pests]