goosebump vs goose bump

goosebump and goose bump both are nouns.

Word	Noun	Adjective	Verb	Adverb
goosebump	Yes	No	No	No
goose bump	Yes	No	No	No

As nouns, goosebump and goose bump are synonyms defined as:

goosebump and goose bump: reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation

Other synonyms of goosebump include goose pimple, goose skin, gooseflesh, horripilation, pilomotor reflex.

goosebump (noun)	goose bump (noun)
reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation	reflex erection of hairs of the skin in response to cold or emotional stress or skin irritation