- X-axis Noun
- X-factor Noun
- X-ray Noun Verb
- Xanthate Noun
- Xanthating Noun
- Xanthator Noun
- Xanthein Noun
- Xanthelasma Noun
- Xanthelasmatosis Noun
- Xanthene Noun
- Xanthenyl Adj Noun
- Xanthine Noun
- Xanthinuria Noun
- Xanthippe Noun
- Xanthochroism Noun
- Xanthochromia Noun
- Xanthoconite Noun
- Xanthoderma Noun
- Xanthogen Noun
- Xanthogenate Noun
- Xanthogenyl Noun
- Xanthoma Noun
- Xanthomatosis Noun
- Xanthomycin Noun
- Xanthone Noun
- Xanthopathy Noun
- Xanthophyll Noun
- Xanthophyllite Noun
- Xanthoprotein Noun
- Xanthopsia Noun
- Xanthopterin Noun
- Xanthopurpurin Noun
- Xanthorhamnin Noun
- Xanthosiderite Noun
- Xanthosine Noun
- Xanthosis Noun
- Xanthotoxin Noun
- Xanthydrol Noun
- Xantogenate Noun Verb
- Xebec Noun
- Xenia Noun
- Xenical Noun
- Xenoantibody Noun
- Xenoantigen Noun
- Xenoantiserum Noun
- Xenobiology Noun
- Xenocryst Noun
- Xenodiagnosis Noun
- Xenodochium Noun
- Xenogamy Noun
- Xenogenesis Noun
- Xenogenicity Noun
- Xenograft Noun
- Xenografting Noun
- Xenography Noun
- Xenolite Noun
- Xenolith Noun
- Xenomania Noun
- Xenon Noun
- Xenoparasite Noun