specialise vs modify

specialise and modify both are verbs.

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

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

specialise (verb)	modify (verb)
become more focused on an area of activity or field of study	make less severe or harsh or extreme
suit to a special purpose	add a modifier to a constituent
evolve so as to lead to a new species or develop in a way most suited to the environment	cause to change; make different; cause a transformation
be specific about
devote oneself to a special area of work