[1] : WordNet (r) 2.0

weak point
     n : an attribute that is inadequate or deficient ant: forte
see also:
forte 

[2] : Moby Thesaurus II by Grady Ward, 1.0

73 moby thesaurus words for "weak point":
   argument, argument by analogy, argumentum ad baculum,
   argumentum ad captandum, argumentum ad hominem, assailability,
   bad case, bad habit, begging the question, besetting sin, blemish,
   bug, catch, chink, circular argument, claptrap, crack,
   crowd-pleasing argument, defect, defection, deficiency, drawback,
   empty words, failing, failure, fallacy, fault, faute, feet of clay,
   flaw, foible, formal fallacy, frailty, heel of achilles, hole,
   hysteron proteron, imperfection, inadequacy, infirmity,
   insincere argument, kink, little problem, logical fallacy,
   material fallacy, mere rhetoric, moonshine, moral flaw,
   non sequitur, paralogism, penetrability, petitio principii,
   philosophism, pregnability, problem, pseudosyllogism, rift,
   shortcoming, snag, soft spot, solecism, something missing, sophism,
   sophistry, taint, verbal fallacy, vice, vincibility, vulnerability,
   vulnerable place, vulnerable point, weak link, weak side,
   weakness

Decimal Point >> D Words
Decimal Point, definition of term: Decimal Point
decimal+point_pag1.html

Dew Point >> D Words
Dew Point, definition of term: Dew Point
dew+point_pag1.html

Data Point >> D Words
Data Point, definition of term: Data Point
data+point_pag1.html

Compass Point >> C Words
Compass Point, definition of term: Compass Point
compass+point_pag1.html

Boiling Point >> B Words
Boiling Point, definition of term: Boiling Point
boiling+point_pag1.html

Anchor Point >> A Words
Anchor Point, definition of term: Anchor Point
anchor+point_pag1.html