booster shot vs booster dose

booster shot and booster dose both are nouns.

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

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

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

Other synonyms of booster shot include booster, recall dose.

booster shot (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