impressive

As adjectives the difference between impressive and skookum

is that impressive is making, or tending to make, an impression; having power to impress; adapted to excite attention and feeling, to touch the sensibilities, or affect the conscience; as, an impressive discourse; an impressive scene while skookum is excellent, impressive.

As a noun Skookum is

a domestic cat of a small, short-legged breed.

As adjectives the difference between impressive and whizzy

is that impressive is making, or tending to make, an impression; having power to impress; adapted to excite attention and feeling, to touch the sensibilities, or affect the conscience; as, an impressive discourse; an impressive scene while whizzy is (informal) nifty; impressive, often in a superficial or showy way.

As an adjective impressive

is making, or tending to make, an impression; having power to impress; adapted to excite attention and feeling, to touch the sensibilities, or affect the conscience; as, an impressive discourse; an impressive scene.

As a noun stonker is

(british|slang) something highly impressive.