nonfather means one who is not a father. Lexicurio rates it Sui generis — a strength score of 90 out of 100.
Etymology
From non- + father.
noun
- One who is not a father.“The study, published in AJPM Focus earlier this month, used data from the Multi-Ethnic Study of Atherosclerosis. The men were grouped as being fathers or nonfathers and self-identified as black, Chinese, Hispanic or white. Fathers made up 82% of the group.”