aim vs draw a bead on

aim is a noun but draw a bead on is not a noun.

Word	Noun	Adjective	Verb	Adverb
aim	Yes	No	Yes	No
draw a bead on	No	No	Yes	No

As verbs, aim and draw a bead on are synonyms defined as:

Other synonyms of aim include aspire, shoot for.

As verbs, draw a bead on is a hyponym of aim; that is, draw a bead on is a word with a more specific, narrower meaning than aim:

aim: point or cause to go (blows, weapons, or objects such as photographic equipment) towards
draw a bead on: aim with a gun

Other hyponyms of aim include aim, direct, place, point, target, hold, turn, swing, charge, level, point, level, sight.

aim (noun)	draw a bead on (noun)
the action of directing something at an object
an anticipated outcome that is intended or that guides your planned actions
the goal intended to be attained (and which is believed to be attainable)
the direction or path along which something moves or along which it lies

aim (verb)	draw a bead on (verb)
have an ambitious plan or a lofty goal	have an ambitious plan or a lofty goal
propose or intend	aim with a gun
specifically design a product, event, or activity for a certain public
direct (a remark) toward an intended goal
move into a desired direction of discourse
point or cause to go (blows, weapons, or objects such as photographic equipment) towards
intend (something) to move towards a certain goal