A vow taker is someone who makes a promise or commitment to something. The 8 letter solution for this term is 'promiser, ' which could refer to someone who makes a promise in a marriage ceremony, such as a BRIDE or GROOM. A BRIDE is a 5 letter solution for this term, and a GROOM is also a 5 letter solution. A 3 letter solution for this term is 'NUN, ' which is a woman who has taken religious vows and dedicated her life to the service of God. A 4 letter solution for this term is 'MONK, ' which is a man who has taken religious vows and dedicated his life to the service of God. The 8 letter solution for this term is 'CELIBATE, ' which refers to someone who has taken a vow of celibacy and abstains from sexual activity.