impecunious vs in straitened circumstances

impecunious and in straitened circumstances both are adjectives.

Word	Noun	Adjective	Verb	Adverb
impecunious	No	Yes	No	No
in straitened circumstances	No	Yes	No	No

As adjectives, impecunious and in straitened circumstances are synonyms defined as:

impecunious and in straitened circumstances: not having enough money to pay for necessities

Other synonyms of impecunious include hard up, penniless, penurious, pinched.

impecunious (adjective)	in straitened circumstances (adjective)
not having enough money to pay for necessities	not having enough money to pay for necessities