booster shot

noun 0.916

booster injection

noun 0.889

booster

noun 0.877

boosting

noun 0.682

boost

noun 0.656

booster club

noun 0.613

boosterism

noun 0.578

bolstering

noun 0.561

dose

noun 0.557

shot in the arm

noun 0.541

immunostimulant

noun 0.536

bolster

noun 0.531

vaccination

noun 0.524

dosage

noun 0.514

injection

noun 0.511

boaster

noun 0.508

effective dose

noun 0.508

booter

noun 0.504

flu shot

noun 0.500