poser vs toughie

poser and toughie both are nouns.

Word	Noun	Adjective	Verb	Adverb
poser	Yes	No	No	No
toughie	Yes	No	No	No

As nouns, poser and toughie are synonyms defined as:

poser and toughie: a particularly difficult or baffling question or problem

Other synonyms of poser include sticker, stumper.

poser (noun)	toughie (noun)
a particularly difficult or baffling question or problem	a particularly difficult or baffling question or problem
a person who poses for a photographer or painter or sculptor	an aggressive and violent young criminal
a person who habitually pretends to be something he is not