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Synonyms for Broad (same or very similar meaning)

WordNet sense 1 (extending relatively far inward):
deep

WordNet sense 2 (having great (or a certain) extent from one side to the other):
wide

WordNet sense 3 (very large in expanse or scope):
spacious

WordNet sense 4 (above average in size or number or quantity or magnitude or extent):
big, large

WordNet sense 5 (capable or worthy of being perceived):
noticeable

WordNet sense 6 (being at a peak or culminating point):
full

WordNet sense 7 (greater than normal in degree or intensity or amount):
high

WordNet sense 8 (not detailed or specific):
unspecific

WordNet sense 9 (applying to all or most members of a category or group):
general

WordNet sense 10 (broad in scope or content):
across-the-board, all-inclusive, blanket, extensive, all-embracing, all-encompassing, encompassing, panoptic

WordNet sense 11 (including all or everything):
comprehensive

WordNet sense 12 (lacking subtlety; obvious):
unsubtle

WordNet sense 13 (clear to the mind):
clear

WordNet sense 14 (showing or characterized by broad-mindedness):
liberal, tolerant, large-minded

WordNet sense 15 (inclined to respect views and beliefs that differ from your own):
broad-minded


From the ODE community, based on WordNetadd/edit