throughout vs end-to-end

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

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

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

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

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