"Subderivation" refers to a process of creating new words or forms from existing ones. Some synonyms for this term include "derivation," "word formation," "morphology," and "affixation." Each of these terms highlights the idea of taking a base word or morpheme and modifying it in some way to create a new word or form. For example, adding the suffix "-ment" to the verb "advertise" creates the noun "advertisement," demonstrating the process of subderivation. Synonyms for subderivation can help linguists and language learners better understand the different processes involved in word formation and how they contribute to the richness and diversity of language.