self-gratification vs head trip

self-gratification and head trip both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-gratification	Yes	No	No	No
head trip	Yes	No	No	No

As nouns, self-gratification and head trip are synonyms defined as:

self-gratification and head trip: the act of satisfying your own desires and giving yourself pleasure

self-gratification (noun)	head trip (noun)
the act of satisfying your own desires and giving yourself pleasure	the act of satisfying your own desires and giving yourself pleasure
indiscipline with regard to sensuous pleasures	an exciting or stimulating experience