Try this:
Nouns are Naming words, they both have the letter N in them, so remember; Noun - Naming.
Then verb and ADverb. Normally, an AD is an advertisement, in which people are telling us more about some product. In the case of adverbs, they're telling us more about verbs. ADjectives tell us more about nouns.
Verbs are doing words, I'm not sure how you'll remember that...sorry :(