bottom β The bottom of something is the lowest or deepest part of it.
base β The base of something is its lowest edge or part.
boundary β The boundary of an area of land is an imaginary line that separates it from other areas.
border β The border between two countries or regions is the dividing line between them. Sometimes the border also refers to the land close to this line.
limit β the final, utmost, or furthest boundary or point as to extent, amount, continuance, procedure, etc.: the limit of his experience; the limit of vision.
tip β Eugene (Gladstone) 1888β1953, U.S. playwright: Nobel prize 1936.
point β a fraction whose denominator is some power of 10, usually indicated by a dot (decimal point or point) written before the numerator: as 0.4 = 4/10; 0.126 = 126/1000.
deadline β A deadline is a time or date before which a particular task must be finished or a particular thing must be done.
term β a word or phrase that has a specific or precise meaning within a given discipline or field and might have a different meaning in common usage: Set is a term of art used by mathematicians, and burden of proof is a term of art used by lawyers.
borderline β The borderline between two different or opposite things is the division between them.
bound β Bound is the past tense and past participle of bind.
confine β To confine something to a particular place or group means to prevent it from spreading beyond that place or group.
cusp β any of the small elevations on the grinding or chewing surface of a tooth
foot β (in vertebrates) the terminal part of the leg, below the ankle joint, on which the body stands and moves.
head β Edith, 1897β1981, U.S. costume designer.
heel β a contemptibly dishonorable or irresponsible person: We all feel like heels for ducking out on you like this.
limitation β a limiting condition; restrictive weakness; lack of capacity; inability or handicap: He knows his limitations as a writer.
nib β his/her nibs, Informal: Often Facetious. a person in authority, especially one who is demanding and tyrannical: His nibs wants fresh strawberries in December.
stump β the lower end of a tree or plant left after the main part falls or is cut off; a standing tree trunk from which the upper part and branches have been removed.
tail β the limitation of an estate to a person and the personβs heirs or some particular class of such heirs.
terminal β situated at or forming the end or extremity of something: a terminal feature of a vista.