chair vs lead

chair and lead both are nouns.

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

As verbs, chair and lead are synonyms defined as:

Other synonyms of chair include moderate.

As verbs, lead is a hypernym of chair; that is, lead is a word with a broader meaning than chair:

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

Other hypernyms of chair include head.

chair (noun)	lead (noun)
the position of professor	the playing of a card to start a trick in bridge
a seat for one person, with a support for the back	a position of being the initiator of something and an example that others will follow (especially in the phrase `take the lead')
an instrument of execution by electrocution; resembles an ordinary seat for one person	a jumper that consists of a short piece of wire
a particular seat in an orchestra	thin strip of metal used to separate lines of type in printing
the officer who presides at the meetings of an organization	restraint consisting of a rope (or light chain) used to restrain an animal
	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

chair (verb)	lead (verb)
preside over	cause to undertake a certain action
act or preside as chair, as of an academic department in a university	preside over
	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