call in vs come by

call in and come by both are verbs.

Word	Noun	Adjective	Verb	Adverb
call in	No	No	Yes	No
come by	No	No	Yes	No

As verbs, come by is a hyponym of call in; that is, come by is a word with a more specific, narrower meaning than call in:

Other hyponyms of call in include see, see, drop by, drop in, call on.

call in (verb)	come by (verb)
make a phone call	obtain, especially accidentally
summon to a particular activity or employment	visit informally and spontaneously
summon to enter
cause to be returned
demand payment of (a loan)
pay a brief visit
take a player out of a game in order to exchange for another player