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

<line_type-sing>

fire support coordination line

<specific_vehicle_type-pl>

fire support team vehicles

<supporting_fire_command>

support <attack_noun_phrase> <on_prep> <engagement_loc> <by_fire_phrase>

support <by_fire_phrase> <attack_noun_phrase> <on_prep> <engagement_loc>

<specific_vehicle_type-sing>

fire support team vehicle

<css_company_echelon>

armor battalion support platoon

maintenance support team

mechanized battalion support platoon

<specific_vehicle_type-not_creatable-pl>

fire support team vehicles

<specific_vehicle_type-creatable-sing>

fire support team vehicle

<specific_vehicle_type-not_creatable-sing>

fire support team vehicle

<specific_vehicle_type-not_creatable>

fire support team vehicle

fire support team vehicles