Collocations for broad - adj.

be

extremely, fairly, very, etc.
reasonably, relatively
enough, sufficiently
He questioned whether the curriculum was broad enough in scope.

overly (esp. AmE)
unusually
His job gave him an acquaintance with an unusually broad spectrum of society.

Broad is used with these nouns:
accent, acceptance, agenda, agreement, aim, alliance, appeal, arc, area, array, aspect, assessment, audience, avenue, back, background, base, bean, belt, boulevard, brim, brow, category, chest, classification, clientele, coalition, comparison, concept, conception, connotation, consensus, constituency, context, correlation, cross section, curriculum, daylight, definition, difference, discretion, discussion, distinction, distribution, division, expanse, focus, forehead, framework, gauge, generalization, grin, guideline, heading, hint, implication, indication, interest, interpretation, jump, knowledge, latitude, leaf, line, mandate, market, measure, mix, objective, outline, outlook, overview, picture, plateau, principle, programme, range, recommendation, reform, repertoire, representation, river, road, scope, selection, sense, set, shoulder, similarity, smile, span, spectrum, staircase, strap, strategy, street, stripe, stroke, support, survey, sweep, tendency, term, theme, thrust, topic, type, umbrella, understanding, valley, variety, view, vision, welcome, wing, wink