How to pluralize ellipsis?
JavaScript (ES6), 58 57 bytes

NB: This turns out to use the same trick as Jonathan Allan in this Jelly answer (though I noticed after posting). 

Saved 1 byte thanks to Jonathan Allan

Works on arrays of strings.

s=&gt;s.map(s=&gt;s+'01120101'.replace(/./g,n=&gt;s.substr(-n,1)))


Test cases



let f =

s=&gt;s.map(s=&gt;s+'01120101'.replace(/./g,n=&gt;s.substr(-n,1)))

console.log(f(['ellipsis']))
console.log(f(['goat']))
console.log(f(['covfefe']))
console.log(f(['programmer5000']))
console.log(f(['up', 'vote', 'down', 'goat']))
console.log(f(['it', 'is', 'golf', 'yo']))
console.log(f(['crossed', 'out', '44', 'is', 'still', '44']))