outing vs pleasure trip

outing and pleasure trip both are nouns.

Word	Noun	Adjective	Verb	Adverb
outing	Yes	No	No	No
pleasure trip	Yes	No	No	No

As nouns, outing and pleasure trip are synonyms defined as:

Other synonyms of outing include excursion, expedition, jaunt, junket, sashay.

outing (noun)	pleasure trip (noun)
a journey taken for pleasure	a journey taken for pleasure
a day devoted to an outdoor social gathering