As nouns the difference between snowcat and snowcap
is that snowcat is a truck-like enclosed vehicle on tracks, designed to move on snow while snowcap is (uncountable) a layer of snow covering a mountain top.
snowcap
English
Noun
(
en noun)
(uncountable) A layer of snow covering a mountain top.
(countable) A small hummingbird, Microchera albocoronata , which is a resident breeder in Honduras, Nicaragua, Costa Rica and western Panama.