nervine

As adjectives the difference between nervine and tonic

is that nervine is (medicine) having the quality of acting upon or affecting the nerves; quieting nervous excitement while tonic is (physics|pathology) pertaining to tension, especially of muscles or tonic can be (music) pertaining to the keynote of a composition.

As a noun tonic is

a substance with medicinal properties intended to restore or invigorate or tonic can be (music) the first note of a scale.

As adjectives the difference between cervine and nervine

is that cervine is pertaining to a deer; deer-like while nervine is having the quality of acting upon or affecting the nerves; quieting nervous excitement.

As a verb nerving

is present participle of nerve.

As an adjective nervine is

having the quality of acting upon or affecting the nerves; quieting nervous excitement.

Nerine is likely misspelled.

Nerine has no English definition.

As an adjective nervine is

having the quality of acting upon or affecting the nerves; quieting nervous excitement.

As an adjective nervine

is (medicine) having the quality of acting upon or affecting the nerves; quieting nervous excitement.

As a noun jervine is

(organic compound) a steroidal alkaloid, obtained from plants of the genus veratrum , that is teratogenic.