there is a small UK kit car company called Dax.
name cars that end with o. such as ugo
None
Some nouns that end with the letter X are:annexanthraxapexboxclimaxcortexcruxduplexequinoxfaxfixflaxfoxhelixhexhoaxibexindexjinxlarynxlatexloxlynxmixonyxoryxoxparadoxpoxsaxsexsixtaxvortexwaxXanaxXerox
Examples of singular nouns that end with the letter 's' are:abacusabyssalbatrossaxisbonusbrassbuscactuscanvasclassdressduressexcessexodusflossfocusfussgasgeniusglassgoddessgrassguessharnesshostessibisirisisthmuskindnesslasslenslosslotusmassmessmissmistressmossnautilusnemesisoasisonusopuspasspelvisplatypuspusradiusrecesssinusstatusstressthesaurustuberculosisviruswalrus
xenophobic
Xi
Xerox
Ajaxflaxcoaxhoaxflexplexapex.
Xenon
ex... EVERYONE KNOWS THAT!
Phoenix is the capital of Arizona
ibex