add-on, n.

<noun.artifact> freq. cnt.: 5 freq. cnt.: 4 freq. cnt.: 1
accessory add-on appurtenance supplement
lexical pointers
derivationally related form
lexical pointers
derivationally related form
lexical pointers
derivationally related form
lexical pointers
derivationally related form
semantic pointers
hypernym
hyponym

<noun.artifact> freq. cnt.: 5 freq. cnt.: 5
add-on addition improver
sample sentences
"the addition of a bathroom was a major improvement""the addition of cinnamon improved the flavor"
lexical pointers
derivationally related form
lexical pointers
derivationally related form
lexical pointers
derivationally related form
semantic pointers
hypernym
hyponym

<noun.communication>
add-on plug-in
semantic pointers
hypernym