sonsie vs buxom

sonsie and buxom both are adjectives.

Word	Noun	Adjective	Verb	Adverb
sonsie	No	Yes	No	No
buxom	No	Yes	No	No

As adjectives, sonsie and buxom are synonyms defined as:

sonsie and buxom: (of a woman's body) having a large bosom and pleasing curves

Other synonyms of sonsie include bosomy, busty, curvaceous, curvy, full-bosomed, sonsy, stacked, voluptuous, well-endowed.

sonsie (adjective)	buxom (adjective)
(of a woman's body) having a large bosom and pleasing curves	(of a female body) healthily plump and vigorous
	(of a woman's body) having a large bosom and pleasing curves