Synonyms for Imprecise:

adj.

erroneous (adjective)
inaccurate.
faulty (adjective)
inexact, wrong, inaccurate.
general (adjective)
vague.
imprecise (adjective)
approximate, inaccurate, incorrect, inexact.
inaccurate (adjective)
incorrect.
indefinite (adjective)
general, obscure.
lax (adjective)
shapeless.
nebulous (adjective)
cloudy, hazy, amorphous.
obscure (adjective)
formless, Obfuscated, cloudy, opaque, unintelligible, turbid, foggy, amorphous, vague, hazy, shapeless, obscure, incoherent.
rough (adjective)
foggy.
vague (adjective)
questionable, unintelligible.
wrong (adjective)
incorrect.

n.

broadly, roughly, wrong, questionable, approximately. imprecise (noun)
general, inexact.

Other synonyms:

questionable, roughly, approximately. broadly, wrong. Other relevant words:
general, questionable, roughly, wrong.