- XXXII
- xylographer
- xanthosoma
- xylol
- xylophagous
- xylomelum
- xylophonist
- xylose
- xylosma
- xyris operculata
- xystus
- xyridales
- xanthuria
- xanthous
- xanthosoma atrovirens
- xcvi
- xcv
- xenarthra
- xenarthral
- xenia
- xenial
- xenicus gilviventris
- xenicus
- xenodochium
- xenodochy
- xenium
- xenogenesis
- xenograft
- xenomania
- xenomorphic
- xenophobe
- xenophobic
- xenophon
- xenopus
- xenopus laevis
- xenosaurus
- xeransis
- xenotransplant
- xerantic
- xerochastic
- xeroderma pigmentosum
- xeroderma
- xerographic
- xerographic printer
- xeroma
- xeromyrum
- xeromy rum
- xerophagy
- xerophyllum
- xerophthalmia