RichThesaurus
pusillanimous
vs
viperish
pusillanimous
adj
Showing ignoble cowardice, or contemptible timidity.
viperish
adj
spiteful; treacherous
In the manner of a viper.
How often have the words
pusillanimous
and
viperish
occurred in a corpus of books?
(source:
Google Ngram Viewer
)