self-suggestion vs auto-suggestion

self-suggestion and auto-suggestion both are nouns.

Word	Noun	Adjective	Verb	Adverb
self-suggestion	Yes	No	No	No
auto-suggestion	Yes	No	No	No

As nouns, self-suggestion and auto-suggestion are synonyms defined as:

self-suggestion and auto-suggestion: a system for self-improvement developed by Emile Coue which was popular in the 1920s and 1930s

Other synonyms of self-suggestion include autosuggestion.

self-suggestion (noun)	auto-suggestion (noun)
a system for self-improvement developed by Emile Coue which was popular in the 1920s and 1930s	a system for self-improvement developed by Emile Coue which was popular in the 1920s and 1930s