Synonyms for Derisory:

adj.

all (adjective)
ludicrous, nonsensical, ridiculous, laughable, absurd, preposterous.
crazy (adjective)
ludicrous, nonsensical, ridiculous, foolish, absurd, preposterous.
farcical (adjective)
laughable.
paltry (adjective)
miserable, pitiful.

n.

disdain, disregard, familiarity breeds contempt, derogatory, contempt, scorn. meagre, inadequate, scant, pitiful, miserable, in short/limited supply, not go far, insufficient. derisory (noun)
absurd, ludicrous, ridiculous, laughable, preposterous, nonsensical, foolish.

Other synonyms:

insufficient. inadequate. miserable. Other relevant words:
inadequate, derogatory, insufficient, pitiful.