| APOLOGIST | • apologist n. One who makes an apology. • apologist n. One who speaks or writes in defense of a faith, a cause, or an institution. • APOLOGIST n. a defender by argument. |
| BIOLOGIST | • biologist n. A student of biology; one versed in the science of biology. • BIOLOGIST n. one who studies biology. |
| ECOLOGIST | • ecologist n. A scholar of ecology. • ecologist n. (Uncommon) An environmentalist (one who advocates for the protection of the environment). • ECOLOGIST n. a student of ecology, also OECOLOGIST. |
| ENOLOGIST | • enologist n. Alternative form of oenologist. • ENOLOGIST n. one who studies enology, the science of winemaking. |
| GEOLOGIST | • geologist n. A person who is skilled at geology. • GEOLOGIST n. one who studies geology. |
| MYOLOGIST | • myologist n. A person who works in myology. • MYOLOGIST n. one who studies muscles. |
| NEOLOGIST | • neologist n. One who coins a new word or new words. • neologist n. An innovator in any doctrine or system of belief, especially in theology. • NEOLOGIST n. one who introduces new words or new senses of old words into a language, also NEOLOGIAN. |
| OOLOGISTS | • oologists n. Plural of oologist. • oölogists n. Plural of oölogist. • OOLOGIST n. an expert in oology. |
| OROLOGIST | • orologist n. (Obsolete, rare) One versed in orology. • OROLOGIST n. one versed in orology, the study of mountains, also OREOLOGIST. |
| OTOLOGIST | • otologist n. A doctor specializing in otology. • OTOLOGIST n. a practitioner of otology, the study of the ear. |
| PROLOGIST | • prologist n. (Rare) The writer or speaker of a prologue. • PROLOGIST n. a writer of prologues. |
| UFOLOGIST | • ufologist n. A person who studies UFOs. • UFOLOGIST n. one interested in ufos. |
| UROLOGIST | • urologist n. (Medicine) A doctor of urology. • UROLOGIST n. one versed in urology, the study of urine. |
| ZOOLOGIST | • zoologist n. One who studies zoology. • zoölogist n. Alternative spelling of zoologist. • ZOOLOGIST n. one who studies zoology. |