This question is pretty controversial.
Although humongous is often considered slang by many people the word does appear in several dictionaries (such as the dictionary.reference.com dictionary), meaning it can be considered a word.
While I do not especially recommend using it in official texts remember that if for example you used it in an essay you can always prove to your teacher that it is a real word just by looking it up in a dictionary which you know includes it.
So yes, humongous can be considered a real word.
humongous is, but "ginormous" is not.
The correct spelling is "humongous" (very large in size or number).
Miniscule.
Gigantic, large, gargantuan, humongous.
The giant almost flattened the travelers with his gargantuan foot as he walked through the forest.
humongous is, but "ginormous" is not.
gigantischer
sachin is anxious about playing in fron of humongous home crowds.
Humongous
humongous gigantic large
Gigantic, Humongous, Huge, Great
The likely word is the adjective humongous (huge, enormous).
Gigantic, Humongous, Colossal, Immense
Massive, colossal, humongous, gigantic, etc.
big, humongous, large, huge, hippo
the humunguos monster destroyed the city by thrwing fire
No, "humungus" is not a standard English word. The correct spelling is "humongous," which means extremely large or huge.