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2500 words of English text about mechanical drawing is a bit excessive. However, if you insist, here is a list of basic mechanical drawing terminology that hopefully will help you complete your project:
Axes: A set of orthogonal lines forming the coordinate axes.
Bisect: A line that is used to divide something in two equal parts.
Circle: A closed shape defined by points equidistant from the center.
Ellipse: A closed shape defined by two points that have a fixed distance from each other.
Leader line: A line with an arrowhead that is used to point to an element in a drawing.
Point: A single location in a two dimensional plane.
Polygon: A closed shape defined by at least three lines.
Projection: An abstract representation of a three-dimensional object onto a two-dimensional plane.
Radius: A line connecting the center to the circumference of a circle or an arc.
Section line: A line that is used to indicate that a portion of the object is shown in section view.
Surface: A two-dimensional area that encloses a volume.
Symbol: A graphical representation of an entity used in a drawing.
Vector: A line with a defined length and direction.
View: An abstract representation of an object in a spatial reference system.
Weld Symbol: A graphical representation of the type of weld used in a structure.
