Synonyms of the word

fatherless

• adj. Without a living father.

illegitimate

• adj. Illegal; against the law.
• adj. Born to unmarried parents.
• adj. Illogical; incorrectly deduced.
• adj. Not authorized by good usage; not genuine; spurious.
• adj. (botany) Involving the fertilization of pistils by stamens not of their own length, in heterogonously…
• n. someone born illegitimately.

parentless

• adj. Having no (living) parent.
• adj. (computing) Having no parent in a data structure.

unparented

• adj. Having no parent, or no acknowledged parent.