Modifiers matching duck:

• unusual,
• tenacious,
• smaller,
• bullying,
• jealous,
• breeding,
• slobbery,
• aggressive,
• optimistic,
• determined,
• zany,
• insecure,
• short-tempered,
• marine,
• indigenous,
• native,
• rare,
• paranoid,
• domestic,
• boastful,
• brash,
• larger,
• large,
• lisping,
• common,
• pushy,
• wild,
• here,
• small,
• daffy,

Simple categories matching slobbery:

• duck,
• person,
• villain,