well-to-do vs well-off

well-to-do and well-off both are adjectives.

Word	Noun	Adjective	Verb	Adverb
well-to-do	No	Yes	No	No
well-off	No	Yes	No	No

As adjectives, well-to-do and well-off are synonyms defined as:

well-to-do and well-off: in fortunate circumstances financially; moderately rich

Other synonyms of well-to-do include comfortable, easy, prosperous, well-fixed, well-heeled, well-situated.

well-to-do (adjective)	well-off (adjective)
in fortunate circumstances financially; moderately rich	fortunately situated
	in fortunate circumstances financially; moderately rich