retirement account vs plan

retirement account and plan both are nouns.

Word	Noun	Adjective	Verb	Adverb
retirement account	Yes	No	No	No
plan	Yes	No	Yes	No

As nouns, plan is a hypernym of retirement account; that is, plan is a word with a broader meaning than retirement account:

retirement account: a plan for setting aside money to be spent after retirement
plan: a series of steps to be carried out or goals to be accomplished

Other hypernyms of retirement account include program, programme.

retirement account (noun)	plan (noun)
a plan for setting aside money to be spent after retirement	scale drawing of a structure
	a series of steps to be carried out or goals to be accomplished
	an arrangement scheme

retirement account (verb)	plan (verb)
	make plans for something
	have the will and intention to carry out some action
	make or work out a plan for; devise