What do the following pairs of words have in common?

GULLIVER & CLEARNESS

TRAGICOMEDY & PENTAGON

CHINCHILLA & MAGDALEN

TERRESTRIAL & ECOTERRORIST

THUNDERSHOWER & INTELLECTUAL

HINT:

Hidden in each clue are two words which make up a common phrase.

Answers:

gulLIVEer & cLEARNess

tragiCOMEdy & pentaGOn

chincHILLa & magDALEne

terresTRIAL & ecotERRORist

thunderSHOWer & inTELLectual