Is there an alternative way rather than to use nested loops?

Question

const findSimilerWords = (strArr, input) => {

for(let i of strArr){
for (let key in letters){
if (key === i){
input.push(letters[key]);
break;
}
if (letters[key] === i){
input.push(key);
break;
}
}
}
}

Answer 1

Be sure to tag the appropriate programming language. Also, what is the objective of this code?