Browse Synonym: Letter "X"
- x
- xanax
- xanthine
- xanthippe
- xanthoma multiplex
- xanthomatosis
- xanthophyll
- Xanthosoma atrovirens
- xanthosoma-sagittifolium
- x-axis
- xbox
- x-c
- Xenicidae
- xenograft
- xenon
- xenophobia
- xenophobic
- Xenorhyncus asiaticus
- xenotransplantation
- xeroma
- xerophile
- xerophilous plant
- xerophthalmia
- xerophthalmus
- xerophyte
- xerophytic plant
- xerostomia
- xerotes
- xerox
- Xerox [tm]
- xerox (trademark)
- x-factor
- xi
- xian
- xii
- xiii
- Ximenesia encelioides
- Xiphosurus polyphemus
- xiv
- xix
- xizang
- xl
- x-linked
- xmas
- x-radiation
- x-rated
- x-ray
- x-ray-photograph
- X-ray picture
- x-rays
- xt
- xtc
- x+v
- xvi
- xvii
- xviii
- xx
- xxi
- xxii
- xxiii
- xxiv
- xxix
- xxv
- xxvi
- xxvii
- xxviii
- xxx
- xylem
- xylene
- xylitol
- xylophone
- xylophones
- Xyphophorus helleri
- xyridales
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