Synonyms for Spleenful:

adj.

resentful (adjective)
stung, envious, hurt, irritated, galled, offended, splenetic, vindictive, vexed, discontent, antagonistic, Huffed, bitter, Piqued, acerbic, malevolent, infuriated, resentful, spiteful, sore, miffed, embittered.
spiteful (adjective)
malevolent, vindictive, splenetic.

Other synonyms:

adj.
spiteful.