The phrase "without spot" can be replaced with several synonyms to convey the same meaning. One of such synonyms is "blemish-free" which refers to something that is free from any imperfections. Another synonym is "unblemished" which refers to something that is entirely untouched and undamaged. One can also use "flawless" to describe something that is perfect and lacks any defects. Additionally, "immaculate" can be used to depict something that is entirely clean and pure. Lastly, "untarnished" can be used to describe something that is free from any stains or marks. These synonyms can be utilized interchangeably based on the context, and they effectively illustrate a state of perfection without any imperfections or flaws.