undertake vs condition

undertake is not a noun while condition is a noun.

Word	Noun	Adjective	Verb	Adverb
undertake	No	No	Yes	No
condition	Yes	No	Yes	No

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

undertake: enter into a contractual arrangement
condition: specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement

Other hyponyms of undertake include stipulate, sign, qualify, specify, stipulate, lease, rent, charter, hire, lease, rent.

undertake (noun)	condition (noun)
	information that should be kept in mind when making a decision
	the procedure that is varied in order to estimate a variable's effect by comparison with a control condition
	an assumption on which rests the validity or effect of something else
	(usually plural) a statement of what is required as part of an agreement
	a state at a particular time
	a mode of being or form of existence of a person or thing
	the state of (good) health (especially in the phrases `in condition' or `in shape' or `out of condition' or `out of shape')
	an illness, disease, or other medical problem

undertake (verb)	condition (verb)
promise to do or accomplish	apply conditioner to in order to make smooth and shiny
enter into a contractual arrangement	put into a better state
enter upon an activity or enterprise	specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement
accept as a charge	develop (a child's or animal's) behavior by instruction and practice; especially to teach self-control
accept as a challenge	establish a conditioned response