recall dose vs booster dose

recall dose and booster dose both are nouns.

Word	Noun	Adjective	Verb	Adverb
recall dose	Yes	No	No	No
booster dose	Yes	No	No	No

As nouns, recall dose and booster dose are synonyms defined as:

recall dose and booster dose: an additional dose that makes sure the first dose was effective

Other synonyms of recall dose include booster, booster shot.

recall dose (noun)	booster dose (noun)
an additional dose that makes sure the first dose was effective	an additional dose that makes sure the first dose was effective