Modifiers matching nerd:

• intelligent,
• obnoxious,
• annoying,
• whiny,
• nerdy,
• know-it-all,
• technically-brilliant,
• geeky,
• sarcastic,
• polite,
• obsessive,
• socially-awkward,
• scientific,
• sensitive,
• brilliant,
• urbane,
• obese,
• cruel,
• diligent,
• entertaining,
• smart,
• pretentious,
• considerate,
• overweight,
• educated,
• bureaucratic,
• clever,
• witty,
• narcissistic,
• caring,
• sanctimonious,
• affable,
• self-satisfied,
• insightful,
• insecure,
• eager-to-impress,
• literate,
• imperious,
• observant,
• judgmental,
• resourceful,
• knowledgeable,
• smug,
• bumbling,
• petulant,
• friendly,
• attention-seeking,
• funny,
• short,
• fat,
• youthful,
• insensitive,
• suave,
• hard-working,
• egotistical,
• precocious,
• zany,
• timid,
• anti-social,
• cultured,

Simple categories matching bumbling:

• nerd,
• person,
• invalid,
• comedian,
• policeman,
• bureaucrat,
• clown,
• detective,
• thug,
• geek,
• fool,
• mayor,
• child,
• actor,
• sidekick,