toughie vs poser

toughie and poser both are nouns.

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

As nouns, toughie and poser are synonyms defined as:

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

Other synonyms of toughie include sticker, stumper.

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