| participator in(verb, expression, phrasal verb, agent) |
| party to(verb, expression, phrasal verb, agent) |
| peer(noun, associate, companion, friend, contemporary) |
| pillar(noun, support, stay, rock, partisan) |
| playmate(noun, associate, companion, friend, contemporary) |
| preserver(noun, support, stay, champion, partisan) |
| prop(noun, support, stay, rock, partisan) |
| proponent(noun, support, stay, champion, partisan) |
| reciprocal(noun, associate, companion, friend, contemporary) |
| roommate(noun, companion, friend, contemporary, acquaintance) |
| satellite(noun, support, stay, champion, partisan) |
| schoolmate(noun, companion, friend, contemporary, acquaintance) |
| second(noun, support, stay, rock, champion) |
| spouse(noun, companion, friend, contemporary, acquaintance) |
| stalwart(noun, support, stay, rock, champion) |
| stay(noun, support, rock, fan, partisan) |
| supporter(noun, support, aid, stay, rock) |
| sustainer(noun, support, stay, champion, partisan) |
| tower of strength(noun, support, stay, champion, partisan) |
| twin(noun, associate, companion, friend, contemporary) |