What is another word for "naturalist"?

Roget's Thesaurus (1911) lists these synonyms for "naturalist": albumen, anabolism, anatomy, animated, antherozoid, bacteriology, biology, bioplasm, biotaxy, botany, chemistry, chromosome, cytoplasm, gamete, germinal, history, invagination, living, matter, metabolism, metaplasm, microbiology, morphology, mycology, natural, nature, oecology, ontogeny, organic, organism, organization, ovary, ovum, oxidation, phylogeny, physiology, polymorphism, production, protein, protoplasm.