There are three main types of clouds: stratus clouds which are blanket-like, cumulus clouds which are billowy and puffy rising from a flat bottom, and cirrus clouds which are wispy and feather-like. Clouds can be named according to their altitude by using Latin prefixes like "cirro" for high altitude or "alto" for middle altitude clouds, or suffixes like "nimbus" to indicate storm clouds. Examples of named clouds include alto stratus clouds with the "alto" prefix and cumulo nimbus clouds with the "nimbus" suffix.