decide vs make up one's mind

decide and make up one's mind both are verbs.

Word	Noun	Adjective	Verb	Adverb
decide	No	No	Yes	No
make up one's mind	No	No	Yes	No

As verbs, decide and make up one's mind are synonyms defined as:

decide and make up one's mind: reach, make, or come to a decision about something

Other synonyms of decide include determine.

decide (verb)	make up one's mind (verb)
reach, make, or come to a decision about something	reach, make, or come to a decision about something
bring to an end; settle conclusively
cause to decide
influence or determine