Synonyms and related words :
benign, harmless, homely, humble, humble-looking, humble-visaged, humblest, inglorious, innocent, inoffensive, least, low, lowest, lowliest, lowly, mean, modest, nonmalignant, nonpoisonous, nontoxic, nonvirulent, plain, poor, sapless, simple, small, teachable, undamaging, undistinguished, unhurtful, unimportant, uninjurious, unobnoxious, unoffending, unpretentious