pudding face vs physiognomy

pudding face and physiognomy both are nouns.

Word	Noun	Adjective	Verb	Adverb
pudding face	Yes	No	No	No
physiognomy	Yes	No	No	No

As nouns, physiognomy is a hypernym of pudding face; that is, physiognomy is a word with a broader meaning than pudding face:

pudding face: a large fat human face
physiognomy: the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)

Other hypernyms of pudding face include countenance, kisser, mug, phiz, smiler, visage.

pudding face (noun)	physiognomy (noun)
a large fat human face	the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)