Collocations for conventional - adj.

be, seem

extremely, fairly, very, etc.
highly
entirely, utterly (esp. AmE)
largely
seemingly

Conventional is used with these nouns:
agriculture, approach, armaments, assumption, channel, definition, design, distinction, division, doctrine, economics, expectation, explosive, farm, farmer, farming, fashion, force, fuel, idea, manner, marriage, means, medicine, method, missile, morality, notion, oven, politeness, produce, restraint, rocket, sense, spelling, standard, submarine, technique, thinking, treatment, type, understanding, upbringing, value, view, war, warfare, weapon, wisdom