Sentence:  Pluto turns out to be an object in the Kuiper Belt, but other such objects recently discovered are similar to (such as Santa[136108 Haumea] and Easterbunny[136472 Makemake]) or even larger than Pluto (such as <WSD>Eris</WSD>, formerly known as Xena). 
Meaning of the word marked with <WSD> tags:  (Q611) The celestial body 136199 Eris, the most-massive known dwarf planet in the Solar System and the largest known object in the scattered disk; "formerly nicknamed Xena".