compass vs understand

compass is a noun but understand is not a noun.

Word	Noun	Adjective	Verb	Adverb
compass	Yes	No	Yes	No
understand	No	No	Yes	No

As verbs, understand is a hypernym of compass; that is, understand is a word with a broader meaning than compass:

compass (noun)	understand (noun)
navigational instrument for finding directions
drafting instrument used for drawing circles
an area in which something acts or operates or has power or control:
the limit of capability

compass (verb)	understand (verb)
get the meaning of something	know and comprehend the nature or meaning of
travel around, either by plane or ship	perceive (an idea or situation) mentally
bring about; accomplish	believe to be the case
	make sense of a language
	be understanding of