Thanos is restricted to using physical attacks only. I'm reasonably confident he could mess with Zealots head, but I want to see if she can survive his physical attacks, and hurt him with her sword.
It would be like waves wearing down a cliffside... She can do it after a longggggg time but thanos lands one hit and its over... It would be incredibly diffixult for her due to his durabikty and stamina but i think she can pull out 4/10 based on skills alone
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
I've read a lot of comics with Z in them, and while she is impressive she wouldn't/shouldn't be able to take Thanos down, his hide is really that tough. Think about it for a second, Gamora just shattered her God Slayer on his skin, and it didn't leave a mark, nor should a sword ever take someone down who was capable of surviving a black hole.
Thanos on the other hand shouldn't be able to land a solid blow on her. I think he'd win the match every time, but it would take him a long time.
Guys on Thanos' power level (strength level) do not need to hit people in Zealot's durability or strength class to do damage, they can create seismic attacks, or thunder clap attacks from a distance to even things up.
Surprisingly despite her rank. Zealot does not have a fabled sword forged from the creation engine. Though her blades, can repel energy, and seemingly hurt invulnerable beings of Majestic class.
Her biggest attribute, even compared to the likes such as Gamora, or Midnighter is her raw experience, and complete dedication armed/unarmed combat.
Yes I think Zealot can test Thanos, more so then Gamora. As to who would win. Probably Thanos. His own battle smarts, and personal experience complements his overwhelm physical attributes.