grass widow vs Simpson

grass widow and Simpson both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass widow	Yes	No	No	No
Simpson	Yes	No	No	No

grass widow (noun)	Simpson (noun)
a divorced woman or a woman who is separated from her husband	Scottish obstetrician and surgeon who pioneered in the use of ether and discovered the anesthetic effects of chloroform (1811-1870)
	United States divorcee whose marriage to Edward VIII created a constitutional crisis leading to his abdication