Ambit(n.) Circuit or compass.
Ambition(n.) The act of going about to solicit or obtain an office, or any other object of desire; canvassing.
Ambition(n.) An eager, and sometimes an inordinate, desire for preferment, honor, superiority, power, or the attainment of something.
Ambition(v. t.) To seek after ambitiously or eagerly; to covet.

Words within ambits