Linguistry

Yet these parrots, with a bit of dead linguistry, which a Grecian ploughboy or milkmaid would have laughed at, thought themselves, and were thought by others, mighty fine scholars; and, as is frequently the case even now, very competent to instruct others.

While theoretical linguistics might be compared to botany as the study of plants, practical linguistics, or linguistry, can be compared to forestry or gardening, horticulture, soil cultivation, or arboreal practices.