If you like rare words, "imberb" is a fun one. Borrowed from French "imberbe", it means beardless.
The OED has one example, from Aldous Huxley's Antic Hay (1923): "A face of such childish contour and so imberb that he looked like a little boy playing at grown-ups."
Wiktionary adds one more: https://en.wiktionary.org/wiki/imberb #etymology #words #language #beard #RareWords