Friendliness rhymes with:
cleanliness, cabiness, caviness, cleanliness, cloudiness, creepiness, frothiness, solitariness, steadiness, stinginess, storminess, unhappiness, wariness, worthiness
cleanliness, cabiness, caviness, cleanliness, cloudiness, creepiness, frothiness, solitariness, steadiness, stinginess, storminess, unhappiness, wariness, worthiness