A wombo can be used for all parts of speech as well as proper nouns. There are no set rules for the grammatical limits of the wombo, as different parts of speech can be used in combination effectively in wombo form. For example, the popular adverb / verb combination effectively shortens vernacular speech, while leaving meaning intact.
The wombo has also been used in the case of first and last name combinations for the sake of nicknames or general irritation of co-workers / spouses.
Spork: spoon and fork
Ginormous: giant and enormous
Backne: back acne
Swalls: sweaty balls
Vurp: vomit burp (a burp that starts as a burp, but you throw up a little in your mouth as a result).
Shart: shit fart (the resulting skid mark as a result of your fart / poop lower intestinal warning system malfunctioning)
Woad: work load, as in: "I am so exhausted because my woad is way more than I can handle"