fence vs oppose

fence is a noun but oppose is not a noun.

Word	Noun	Adjective	Verb	Adverb
fence	Yes	No	Yes	No
oppose	No	No	Yes	No

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

fence (noun)	oppose (noun)
a barrier that serves to enclose an area
a dealer in stolen property

fence (verb)	oppose (verb)
have an argument about something	be resistant to
surround with a wall in order to fortify	be against; express opposition to
fight with fencing swords	set into opposition or rivalry
enclose with a fence	fight against or resist strongly
receive stolen goods	act against or in opposition to
	contrast with equal weight or force