casuist vs sophist

casuist and sophist both are nouns.

Word	Noun	Adjective	Verb	Adverb
casuist	Yes	No	No	No
sophist	Yes	No	No	No

As nouns, casuist and sophist are synonyms defined as:

casuist and sophist: someone whose reasoning is subtle and often specious

casuist (noun)	sophist (noun)
someone whose reasoning is subtle and often specious	someone whose reasoning is subtle and often specious