Another appropriate term would be SEMI-LEXICAL heads, i.e. heads which are hybrid in the sense that they display both lexical and functional/grammatical characteristics.
(Another appropriate term; would be; SEMI-LEXICAL heads) (i.e. heads; are; hybrid) (they; display; both lexical and functional/grammatical characteristics)
Another appropriate term i.e. heads they
would be are display
SEMI-LEXICAL heads
hybrid
both lexical and functional/grammatical characteristics