Thanklesses is a word that refers to the lack of gratitude or recognition for one's efforts. Some synonyms for this word include ungratefulness, ingratitude, unappreciativeness, and thanklessness. Each of these words accurately conveys the idea of feeling unappreciated or unrecognized for one's hard work and efforts. Other synonyms for thanklesses include disregard, disrespect, neglect, and indifference. These words capture the sense of being ignored or rejected despite one's best efforts. Whether faced with thankless tasks or thankless people, finding words to describe this feeling can help individuals find ways to cope with the challenges they face.