command vs veto

command and veto both are nouns.

Word	Noun	Adjective	Verb	Adverb
command	Yes	No	Yes	No
veto	Yes	No	Yes	No

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

Other hyponyms of command include burden, charge, saddle, requisition, disallow, forbid, interdict, nix, prohibit, proscribe.

command (noun)	veto (noun)
the power or authority to command	a vote that blocks a decision
availability for use	the power or right to prohibit or reject a proposed or intended act (especially the power of a chief executive to reject a bill passed by the legislature)
great skillfulness and knowledge of some subject or activity
an authoritative direction or instruction to do something
(computer science) a line of code written as part of a computer program
a military unit or region under the control of a single officer
a position of highest authority

command (verb)	veto (verb)
make someone do something	command against
be in command of	vote against; refuse to endorse; refuse to assent
demand as one's due
exercise authoritative control or power over
look down on