excursion vs pleasure trip

excursion and pleasure trip both are nouns.

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

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

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

excursion (noun)	pleasure trip (noun)
a journey taken for pleasure	a journey taken for pleasure
wandering from the main path of a journey