The rules that use the vocabulary item "unit" are:

<unit_n>

<force> unit

<unit_n-sing>

<force> unit

<unit_nom-sing>

unit

<unit_n-not_det-sing>

<force> unit

<gesture_unit-sing>

<det-sing-deictic> unit

<unit_nom-not_det-sing>

unit

<displayable_thing-gapsout_null-gapsin_null>

unit call sign

unit call signs

<gesture_unit>

<det-sing-deictic> unit

<unit_nom>

unit