polite vs genteel

polite and genteel both are adjectives.

Word	Noun	Adjective	Verb	Adverb
polite	No	Yes	No	No
genteel	No	Yes	No	No

As adjectives, polite and genteel are synonyms defined as:

Other synonyms of polite include civilised, civilized, cultivated, cultured.

polite (adjective)	genteel (adjective)
showing regard for others in manners, speech, behavior, etc.	marked by refinement in taste and manners
not rude; marked by satisfactory (or especially minimal) adherence to social usages and sufficient but not noteworthy consideration for others
marked by refinement in taste and manners