I.
n.
1.
Ruler, director, governor, manager, superintendent, overseer, lord.
2.
Commander, captain.
3.
Teacher, instructor, tutor, preceptor, school-master, pedagogue.
4.
Owner, proprietor, holder, possessor.
5.
Proficient, adept, master-hand.
6.
Employer.
7.
Chief, principal, head, leader.
II.
v. a.
1.
Overpower, overcome, conquer, subdue, subjugate, vanquish.
2.
Acquire, learn thoroughly, make one's self master of, become an adept in.
III.
a.
Main, chief, leading, principal, cardinal, prime, especial, great, grand, most important.