goo vs goop

goo and goop both are nouns.

Word	Noun	Adjective	Verb	Adverb
goo	Yes	No	No	No
goop	Yes	No	No	No

As nouns, goo and goop are synonyms defined as:

Other synonyms of goo include gook, guck, gunk, muck, ooze, slime, sludge.

goo (noun)	goop (noun)
any thick, viscous matter	street names for gamma hydroxybutyrate
	any thick, viscous matter