1. cynocephali
[noun] dog-headed

2. gibbous
[adjective] more than half full

3. coven
[noun]  a group or gathering of witches who meet regularly

4. horripilation
[noun] the erection of hairs on the skin due to cold, fear, or excitement

5. insomnolence
[noun] sleeplessness

6. gerontophile
[noun] one who loves old people

7. petrichor
[noun] the smell of earth after rain

8. fossorial
[adjective] burrowing or living underground

9. velocipedestrienne
[noun] a female cyclist

10. castrati
[noun] male singers castrated before puberty to prevent change in vocal range

11. ouroboros
[noun] circular symbol of a serpent that eats its own tail

12. griot
[noun] poet and keeper of oral histories

13. flâneur
[noun] idler, saunterer, loafer

14. mongoose
[noun] a kind of snake-eating weasel

15. cephalophore
[noun] head-carrier

16. defenestrate
[verb] to throw someone out a window

17. incubus
[noun] a demonic weight on sleeping women

18. sirenomelia
[noun] congenital fusion of the lower limbs

19. milt
[noun] fish semen

20. troglomaniac
[noun] lover of underground spaces and caves