plan vs concert

plan and concert both are nouns.

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

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

Other hyponyms of plan include engineer, plot, redesign, blueprint, draft, draught, map, map out.

plan (noun)	concert (noun)
scale drawing of a structure	a performance of music by players or singers not involving theatrical staging
a series of steps to be carried out or goals to be accomplished
an arrangement scheme

plan (verb)	concert (verb)
make plans for something	settle by agreement
have the will and intention to carry out some action	contrive (a plan) by mutual agreement
make or work out a plan for; devise