lead vs chair

lead and chair both are nouns.

Word	Noun	Adjective	Verb	Adverb
lead	Yes	No	Yes	No
chair	Yes	No	Yes	No

As verbs, lead and chair are synonyms defined as:

Other synonyms of lead include moderate.

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

lead: be in charge of
chair: act or preside as chair, as of an academic department in a university

Other hyponyms of lead include chairman, captain, spearhead, take charge, take control, take hold.

lead (noun)	chair (noun)
the playing of a card to start a trick in bridge	the position of professor
a position of being the initiator of something and an example that others will follow (especially in the phrase `take the lead')	a seat for one person, with a support for the back
a jumper that consists of a short piece of wire	an instrument of execution by electrocution; resembles an ordinary seat for one person
thin strip of metal used to separate lines of type in printing	a particular seat in an orchestra
restraint consisting of a rope (or light chain) used to restrain an animal	the officer who presides at the meetings of an organization
the timing of ignition relative to the position of the piston in an internal-combustion engine
an advantage held by a competitor in a race
evidence pointing to a possible solution
a news story of major importance
the introductory section of a story
an indication of potential opportunity
(baseball) the position taken by a base runner preparing to advance to the next base
an actor who plays a principal role
(sports) the score by which a team or individual is winning
the angle between the direction a gun is aimed and the position of a moving target (correcting for the flight time of the missile)
mixture of graphite with clay in different degrees of hardness; the marking substance in a pencil
a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey

lead (verb)	chair (verb)
cause to undertake a certain action	preside over
preside over	act or preside as chair, as of an academic department in a university
lead, as in the performance of a composition
travel in front of; go in advance of others
take somebody somewhere
move ahead (of others) in time or space
be in charge of
be conducive to
stretch out over a distance, space, time, or scope; run or extend between two points or beyond a certain point
be ahead of others; be the first
cause something to pass or lead somewhere
lead, extend, or afford access
produce as a result or residue
tend to or result in