shirtdress vs frock

shirtdress and frock both are nouns.

Word	Noun	Adjective	Verb	Adverb
shirtdress	Yes	No	No	No
frock	Yes	No	Yes	No

As nouns, frock is a hypernym of shirtdress; that is, frock is a word with a broader meaning than shirtdress:

shirtdress: a dress that is tailored like a shirt and has buttons all the way down the front
frock: a one-piece garment for a woman; has skirt and bodice

Other hypernyms of shirtdress include dress.

shirtdress (noun)	frock (noun)
a dress that is tailored like a shirt and has buttons all the way down the front	a one-piece garment for a woman; has skirt and bodice
	a habit worn by clerics
	a long, loose outer garment

shirtdress (verb)	frock (verb)
	put a frock on