| friendliwise |
| furtively(quietly, secretly, personally, privately, slyly) |
| genially |
| hand in glove(expression, idiom, together, jointly, collectively) |
| hard(adverb, thoroughly, closely, carefully, firmly) |
| harmoniously(together, jointly, collectively, accordingly) |
| heartily |
| heedfully(adverb, hard, thoroughly, closely, carefully) |
| hush-hush(quietly, secretly, personally, privately, furtively) |
| in a group(expression, idiom, together, jointly, collectively) |
| in camera(expression, quietly, secretly, personally, privately) |
| in common(expression, together, jointly, collectively, accordingly) |
| in company with(expression, idiom, together, jointly, collectively) |
| in concert(expression, together, jointly, collectively, accordingly) |
| in confidence(expression, quietly, secretly, personally, privately) |
| in conjunction(expression, together, jointly, collectively, accordingly) |
| in conjunction with(verb, expression, idiom, adverb, phrasal verb) |
| in holes and corners(expression, idiom, quietly, secretly, personally) |
| in league(expression, together, jointly, collectively, accordingly) |
| in partnership(expression, together, jointly, collectively, accordingly) |