put vs approximate

put is a noun but approximate is not a noun.

Word	Noun	Adjective	Verb	Adverb
put	Yes	No	Yes	No
approximate	No	Yes	Yes	No

As verbs, approximate is a hypernym of put; that is, approximate is a word with a broader meaning than put:

Other hypernyms of put include estimate, gauge, guess, judge.

put (noun)	approximate (noun)
the option to sell a given stock (or stock index or commodity future) at a given price before a given date

put (verb)	approximate (verb)
arrange thoughts, ideas, temporal events	judge tentatively or form an estimate of (quantities or time)
estimate	be close or similar
formulate in a particular style or language
attribute or give
put into a certain place or abstract location
cause to be in a certain state; cause to be in a certain relation
adapt
cause (someone) to undergo something
make an investment