1) Linguistic string 2) String of words 3) Syntagm 4) Word string 1) Syntagm 
[linguistics] In linguistics, a syntagma is an elementary constituent segment within a text. Such a segment can be a phoneme, a word, a grammatical phrase, a sentence, or an event within a larger narrative structure, depending on the level of analysis. Syntagmatic analysis involves the study of relationships (rules of combination) among syn...
(from the article `phalanx`) The basic Greek formation was made more flexible by Philip II of Macedon and his son, Alexander III the Great. Alexander`s core unit in the phalanx ...
Military unit.
[n] - a syntactic string that forms a part of some larger syntactic unit
syntagm noun a syntactic string of words that forms a part of some larger syntactic unit
The systematized wholes of life views, of life tendencies such as aestheticism, naturalism and intellectualism. (Eucken). -- H.H.
an element that enters into a syntagmatic relationship.