plan vs layout

plan and layout both are nouns.

Word	Noun	Adjective	Verb	Adverb
plan	Yes	No	Yes	No
layout	Yes	No	No	No

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

Other hyponyms of plan include configuration, constellation, snare, trap, hotel plan, meal plan.

plan (noun)	layout (noun)
scale drawing of a structure	the act of laying out (as by making plans for something)
a series of steps to be carried out or goals to be accomplished	a plan or design of something that is laid out
an arrangement scheme

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