Find reversed words in a string. O(n) this time.

gistfile1.js

var string = "qwertyuiopasdfghjleirbaglgabrielmnbvcdrgythacnakancajuilsre"; 

function find_reverses(str){
	var j = 0;
var potential_reverses = [];

while(j < string.length){
	if(string[j] === string[j+2]){
		potential_reverses.push({letter:string[j], index: j+2});
	}
	j++;
}

var word = "";
var reversed_words = [];

for(var i = 0; i<potential_reverses.length; i++){

	word += potential_reverses[i].letter;

	var j = potential_reverses[i].index+1;
	var iteration_step = 2;
	while(j < string.length){
		if(string[j-iteration_step-2] === string[j]){
			word+=string[j];
			iteration_step+=2;
			j++;
		}else{
			break;
		}

	}

	if(word.length>1){
		reversed_words.push({
			word: word,
			index:potential_reverses[i].index + 2
		});
	};

	word="";

}

return reversed_words;
}

console.log(find_reverses(string));