shoal vs modify

shoal is a noun but modify is not a noun.

Word	Noun	Adjective	Verb	Adverb
shoal	Yes	No	Yes	No
modify	No	No	Yes	No

As verbs, modify is a hypernym of shoal; that is, modify is a word with a broader meaning than shoal:

Other hypernyms of shoal include alter, change.

shoal (noun)	modify (noun)
a large group of fish
a stretch of shallow water
a sandbank in a stretch of water that is visible at low tide

shoal (verb)	modify (verb)
become shallow	make less severe or harsh or extreme
make shallow	add a modifier to a constituent
	cause to change; make different; cause a transformation