support vs document

support and document both are nouns.

Word	Noun	Adjective	Verb	Adverb
support	Yes	No	Yes	No
document	Yes	No	Yes	No

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

Other hyponyms of support include back, back up, vouch, verify, demonstrate, establish, prove, shew, show, validate.

support (noun)	document (noun)
aiding the cause or policy or interests of	anything serving as a representation of a person's thinking by means of symbolic marks
the act of bearing the weight of or strengthening	writing that provides information (especially information of an official nature)
documentary validation	(computer science) a computer file that contains text (and possibly formatting instructions) using seven-bit ASCII characters
a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission	a written account of ownership or obligation
the activity of providing for or maintaining by supplying with money or necessities
any device that bears the weight of another thing
supporting structure that holds up or provides a foundation
something providing immaterial assistance to a person or cause or interest
a musical part (vocal or instrumental) that supports or provides background for other musical parts
the financial means whereby one lives
financial resources provided to make some project possible

support (verb)	document (verb)
establish or strengthen as with new evidence or facts	support or supply with references
put up with something or somebody unpleasant	record in detail
adopt as a belief
argue or speak in defense of
be a regular customer or client of
be the physical support of; carry the weight of
play a subordinate role to (another performer)
support materially or financially
give moral or psychological support, aid, or courage to
be behind; approve of
support with evidence or authority or make more certain or confirm