endways vs end on

endways and end on both are adverbs.

Word	Noun	Adjective	Verb	Adverb
endways	No	No	No	Yes
end on	No	No	No	Yes

As adverbs, endways and end on are synonyms defined as:

Other synonyms of endways include endwise.

endways (adverb)	end on (adverb)
with the end forward or toward the observer	with the end forward or toward the observer
in or toward the direction of the ends; lengthwise
on end or upright