pause vs hesitation

pause and hesitation both are nouns.

Word	Noun	Adjective	Verb	Adverb
pause	Yes	No	Yes	No
hesitation	Yes	No	No	No

As nouns, hesitation is a hyponym of pause; that is, hesitation is a word with a more specific, narrower meaning than pause:

Other hyponyms of pause include break, recess, respite, time out, falter, faltering, waver, intermission, freeze, halt.

pause (noun)	hesitation (noun)
temporary inactivity	the act of pausing uncertainly
a time interval during which there is a temporary cessation of something	a certain degree of unwillingness
	indecision in speech or action

pause (verb)	hesitation (verb)
cease an action temporarily
interrupt temporarily an activity before continuing