additional
6 synonyms and 1 antonym for additional, grouped by meaning and by how common each one is.
Adjective — Extra; added on top of what already exists.
Synonyms
Everyday swaps
Common words most readers know — safe in any writing.
Less common
Still standard English, but they carry more weight.
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
added
Antonyms
nonsupplementary
How to use additional
The word patterns that sound natural to a native speaker.
additional information
additional cost
additional support
Etymology
A learned borrowing from Latin additionalis, built from addition plus -al.
Full origin of additional →Frequently asked questions
What does “additional” mean?
The word “additional” means extra; added on top of what already exists. In plain terms, more of something, beyond what was already there.
How do you pronounce “additional”?
“Additional” is pronounced uh-DIH-shuh-nuhl (/əˈdɪ.ʃə.nəl/ in IPA).
How do you use “additional” in a sentence?
Here is “additional” used in a sentence: “We need additional staff for the busy season.”
What is the opposite of “additional”?
The opposite of “additional” — its antonyms — is nonsupplementary.
What part of speech is “additional”?
“Additional” is an adjective.
Where does the word “additional” come from?
The word “additional” comes from Latin. A learned borrowing from Latin additionalis, built from addition plus -al.
Is “additional” a common word?
“Additional” is a very common word in modern English, usually learned at around the A2 level.
What is the difference between additional and extra?
The two are near-synonyms, both meaning added to what already exists. Additional is slightly more formal and neutral, common in writing — 'additional charges may apply.' Extra is more everyday and can also suggest a spare or surplus amount — 'an extra blanket.' In most sentences you can swap one for the other.
What is an example of additional?
If a form asks for 'any additional comments,' it wants remarks beyond what you have already given. 'Additional staff were hired for the holidays' means more workers on top of the usual team. In each case, additional points to something added to an existing amount or set.
What is the opposite of additional?
There is no single neat antonym, but the opposite idea is something that is included, standard, or original rather than added on. Words like fewer, reduced, or the phrase 'no extra' capture the reverse. Something 'already included' is the counterpart to an additional item that costs or requires more.
