Snicker
Part of speech: verb
Definition: To emit a snicker—stifled or broken laugh.
Part of speech: noun
Definition: A stifled or broken laugh
Snort
Part of speech: noun
Definition: The sound made by exhaling roughly through the nose.A dose of a drug to be snorted. Here, "drug" includes snuff (i.e., pulverized tobacco). A snort also may be a drink of whiskey, as "Let's have a snort".
Part of speech: verb
Definition: To make a snort; to exhale roughly through the nose.To inhale (usually a drug) through the nose.