clear sailing vs procession

clear sailing and procession both are nouns.

Word	Noun	Adjective	Verb	Adverb
clear sailing	Yes	No	No	No
procession	Yes	No	No	No

As nouns, procession is a hypernym of clear sailing; that is, procession is a word with a broader meaning than clear sailing:

Other hypernyms of clear sailing include advance, advancement, forward motion, onward motion, progress, progression.

clear sailing (noun)	procession (noun)
easy unobstructed progress	the group action of a collection of people or animals or vehicles moving ahead in more or less regular formation
	the act of moving forward (as toward a goal)
	(theology) the origination of the Holy Spirit at Pentecost