gate; door; gateway; doorway; opening; valve; switch; way to do something; knack; family; house; (religious) sect; school (of thought); class; category; phylum or division (taxonomy); classifier for large guns; classifier for lessons, subjects, branches of technology; (suffix) -gate (i.e. scandal; derived from Watergate)
specialized; dedicated (to a particular field or purpose); specially; specifically (for a particular purpose); (of institutions, personnel etc.) designated or assigned for a specific task; special