【Mention】 , 【name】 , 【instance】 , 【specify】 are comparable when they mean to make clear or specific by referring to something explicitly.
【Mention】 indicates a calling attention to, usually by 【name】 where possible, sometimes by a brief, cursory, or incidental reference.
【Name】 implies clear 【mention】 of a 【name】 and therefore may suggest greater explicitness.
【Instance】 may indicate clear explicit reference or definite emphasis as a typical example or special case.
【Specify】 implies statement so explicit, detailed, and specific that misunderstanding is impossible.