additional

noun 0.708

add

noun 0.704

additive

noun 0.698

addendum

noun 0.686

supplement

noun 0.676

extension

noun 0.663

appendage

noun 0.660

supplemental

noun 0.659

addition

noun 0.654

adjunctive

noun 0.644

adjunct

noun 0.641

extra

noun 0.631

adduct

noun 0.623

additionality

noun 0.614

plus

noun 0.613

accessory

noun 0.610

bonus

noun 0.606

addend

noun 0.605

adder

noun 0.602

supplementary

noun 0.596

accessary

noun 0.585

clip-on

noun 0.584

admixture

noun 0.583

expansion pack

noun 0.582

food additive

noun 0.577

append

noun 0.576

modifier

noun 0.572

added time

noun 0.570

option

noun 0.570

adjuvant

noun 0.568

accessorial

noun 0.567

extender

noun 0.566

appending

noun 0.563

supplementation

noun 0.558

annex

noun 0.557

value added

noun 0.555

annexure

noun 0.554

appendix

noun 0.554

addictive

noun 0.550

suffix

noun 0.549

affix

noun 0.546

attachment

noun 0.546

accessory equipment

noun 0.545

extra service

noun 0.542

plus sign

noun 0.541

suboption

noun 0.541

optional

noun 0.541

augment

noun 0.539

admix

noun 0.539

expandable

noun 0.535

value-added service

noun 0.531

ado

noun 0.530

adapter

noun 0.529

side order

noun 0.529

adaptin

noun 0.528

ingredient

noun 0.528

top-up

noun 0.523

module

noun 0.523

addict

noun 0.523

addiction

noun 0.522

enhancement

noun 0.521

overlay

noun 0.517

extendability

noun 0.516

photoaddition

noun 0.516

aftermarket

noun 0.516

prefix

noun 0.515

item

noun 0.515

component

noun 0.513

ancillary

noun 0.512

suppletive

noun 0.511

postmodification

noun 0.511

complement

noun 0.511

subjoin

noun 0.510

auxiliary

noun 0.510

dongle

noun 0.509

insertable

noun 0.509

superadditivity

noun 0.508

addition reaction

noun 0.506

ade

noun 0.506

adornment

noun 0.505

embellishment

noun 0.504

mod

noun 0.503

side note

noun 0.502

full adder

noun 0.502

augmentative

noun 0.502

polyaddition

noun 0.501

affixation

noun 0.500