12-letter words containing a, r, x, e
- transfer tax — a transaction fee imposed on the transfer of title to property
- unexplorable — to traverse or range over (a region, area, etc.) for the purpose of discovery: to explore the island.
- unexpurgated — to amend by removing words, passages, etc., deemed offensive or objectionable: Most children read an expurgated version of Grimms' fairy tales.
- uranic oxide — uranium dioxide.
- xanthopterin — a yellow pigment, C6H5N5O2, found in some butterfly or moth wings or in the urine of mammals
- xenoreactive — (immunology) That generates a reaction to material from another species.