WordNet (r) 3.0 (2006):

brotherly love
    n 1: a kindly and lenient attitude toward people [syn:
         charity, brotherly love]

Moby Thesaurus II by Grady Ward, 1.0:

122 Moby Thesaurus words for "brotherly love":
   Amor, BOMFOG, Benthamism, Christian charity, Christian love, Eros,
   Platonic love, accord, accordance, admiration, adoration,
   affection, affinity, agape, agreement, altruism, amity, ardency,
   ardor, attachment, beneficence, benevolence,
   benevolent disposition, benevolentness, bigheartedness,
   bodily love, bonds of harmony, caritas, cement of friendship,
   charitableness, charity, communion, community,
   community of interests, compatibility, concord, concordance,
   congeniality, conjugal love, correspondence, desire, devotion,
   do-goodism, empathy, esprit, esprit de corps, faithful love, fancy,
   feeling of identity, fellow feeling, fellowship, fervor, flame,
   flower power, fondness, free love, free-lovism, frictionlessness,
   generosity, giving, good vibes, good vibrations, goodwill, grace,
   greatheartedness, happy family, harmony, heart, hero worship,
   humanitarianism, identity, idolatry, idolism, idolization, kinship,
   largeheartedness, lasciviousness, libido, like, like-mindedness,
   liking, love, love of mankind, lovemaking, married love, mutuality,
   oneness, passion, peace, philanthropism, philanthropy,
   physical love, popular regard, popularity, rapport, rapprochement,
   reciprocity, regard, sentiment, sex, sexual love, sharing, shine,
   solidarity, spiritual love, sympathy, symphony, team spirit,
   tender feeling, tender passion, truelove, understanding, union,
   unison, unity, utilitarianism, uxoriousness, weakness, welfarism,
   well-disposedness, worship, yearning