JSFiddle - React, Tailwind, and code Playground

JavaScript

var json =  [{"cat":"Car","terms":["british english","jeep","bmw","brazilian"],"kw":["British English","Fast British English","Blue Jeep","Hot Brazilian Summer"]},{"cat":"Sport","terms":["football","basketball"],"kw":["American Football"]},{"cat":"Clothes","terms":["winter","summer"],"kw":["Hot Summer","Mild Summer","Hot Brazilian Summer"]},{"cat":"Languages","terms":["english","french","german","russian"],"kw":["Anglo-Saxon English","American English","British English","Canadian English","Fast British English","Austrian German"]},{"cat":"Weather","terms":["hot","warm","sunny"],"kw":["Hot Summer","Hot Brazilian Summer"]}]      

var ii, jj, zz, len, csvStr, rowCount, hasRow, foundList;

	    ii = 0;
	    jj = 0;
	    zz = 0;
    	len = json.length;
	    csvStr = "";
	    foundList = [];        

        var tempObj = {};
		for (ii = 0; ii < len; ii++) {
			for (jj = 0; jj < json[ii].kw.length; jj++) {
				for (zz = 0; zz < json[ii].terms.length; zz++) {
					// checking whether keyword contains the term
					if ( json[ii].kw[jj].toLowerCase().trim().indexOf(json[ii].terms[zz].toLowerCase().trim()) != -1) {
						tempObj.keyword = json[ii].kw[jj];
						tempObj.term = json[ii].terms[zz];
						tempObj.cat = json[ii].cat;
						foundList.push(clone(tempObj));
					}
				}
			}
		}
		var uniques = {};
		foundList.forEach(function (item) {
			var serialized = JSON.stringify({key:item.keyword, cat:item.cat});
			if (isMoreSpecific(item.term, uniques[serialized])) {
				uniques[serialized] = item.term;
			}
		});
		
		var keywordcategory = {};
		for (var serialized in uniques) {
    		var obj = JSON.parse(serialized);
    		keywordcategory[obj.key] = obj.cat;
		}

		for (var key in keywordcategory) {
			if (keywordcategory.hasOwnProperty(key)) {
				csvStr += keywordcategory[key] + "\t";
				csvStr += key + "\r\n";
			}
		}

        console.log(csvStr);

        function isMoreSpecific(term, reference) {
	        return !reference || term.indexOf(reference) !== -1;
	  ...