| Exon | exon |
| Exonym | exonym xenonym |
| Exonymon | exonym |
| Exot | exotic |
| Axon | axon axone |
| exogen | exogenous |
| Taxon | taxon |
| Exomond | exomoon |
| Exotik | exoticism |
| Exodus | Exodus Book of Exodus |
| exogam | exogamous |
| Exokarp | epicarp |
| Oxonium | oxonium |
| Naloxon | naloxone |
| Sexologe | sexologist |
| Sexologin | sexologist |
| Exogamie | exogamy |
| Exoplanet | exoplanet extrasolar planet |
| Exorzist | exorcist |
| exotherm | exothermic |