laptop computer vs laptop

laptop computer and laptop both are nouns.

Word	Noun	Adjective	Verb	Adverb
laptop computer	Yes	No	No	No
laptop	Yes	No	No	No

As nouns, laptop computer and laptop are synonyms defined as:

laptop computer and laptop: a portable computer small enough to use in your lap

laptop computer (noun)	laptop (noun)
a portable computer small enough to use in your lap	a portable computer small enough to use in your lap