end-to-end vs throughout

end-to-end is an adjective but throughout is not an adjective.

Word	Noun	Adjective	Verb	Adverb
end-to-end	No	Yes	No	Yes
throughout	No	No	No	Yes

As adverbs, end-to-end and throughout are synonyms defined as:

end-to-end (adjective)	throughout (adjective)
with the end of one object in contact lengthwise with the end of another object

end-to-end (adverb)	throughout (adverb)
from first to last	from first to last
	used to refer to cited works