bedfast vs bedridden

bedfast and bedridden both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bedfast	No	Yes	No	No
bedridden	No	Yes	No	No

As adjectives, bedfast and bedridden are synonyms defined as:

Other synonyms of bedfast include bedrid, sick-abed.

bedfast (adjective)	bedridden (adjective)
confined to bed (by illness)	confined to bed (by illness)