Attributes or descriptive words are used talk about a noun. For instance, you can have a green shirt, a dirty shirt or a big shirt.
asleep, bad, big, clean, cold, dirty, dry, fast, good, happy, high, hot, hungry, hurt, little, sad, scared, sick, tired, wet, yuk, and (colour names)
Opposite games (books too) are great for learning these words.
eg Big/small, Dirty/clean and so on.
Download some attribute pictures here.
These books are great for learning what words mean and using them in repetition.