syntagma vs syntagm

syntagma and syntagm both are nouns.

Word	Noun	Adjective	Verb	Adverb
syntagma	Yes	No	No	No
syntagm	Yes	No	No	No

As nouns, syntagma and syntagm are synonyms defined as:

syntagma and syntagm: a syntactic string of words that forms a part of some larger syntactic unit

syntagma (noun)	syntagm (noun)
a syntactic string of words that forms a part of some larger syntactic unit	a syntactic string of words that forms a part of some larger syntactic unit