An expert is someone who possesses extensive knowledge or skills in a particular field, often acquired through education, training, and experience. For example, a university professor who specializes in neuroscience conducts research, teaches courses, and guides students in their studies. Experts often share their expertise through publications, lectures, and mentorship, contributing to the advancement of their field.
A grammatical person is a person who teaches or who is expert in grammar.
teacher
Penny teaches Baby
Teacher, professor, and instructor are some terms for someone who teaches.
An educator is someone who teaches or learns from someone else.
... is someone who teaches you about religion.
heretic
paster!:) or Father:)
a `teacher' preferbly
Answer They sometimes can be called an expert, a witness, or an expert witness.
dumce or outcast
Someone who teaches athletics.