well-to-do vs comfortable

well-to-do and comfortable both are adjectives.

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

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

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

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

well-to-do (adjective)	comfortable (adjective)
in fortunate circumstances financially; moderately rich	providing or experiencing physical well-being or relief (`comfy' is informal)
	free from stress or conducive to mental ease; having or affording peace of mind
	in fortunate circumstances financially; moderately rich
	sufficient to provide comfort
	having a wide margin