| lieutenant(noun, assistant, accompaniment) |
| tailpiece(noun, fold, tab, lappet) |
| trim(noun, addition, decoration, fixture) |
| abettor(noun, help, associate, subordinate, representative) |
| accessary |
| accident(noun, action, cause, thing, condition) |
| accomplice(noun, help, aid, associate, subordinate) |
| accoutrement(noun, part, extra, addition, extension) |
| accretion |
| add-on(noun, increase, extra, addition, attachment) |
| adjutant(noun, auxiliary) |
| affiliated(adjective, relational) |
| affinity |
| affix(noun, addition, extension, supplement, addendum) |
| aggrandizement(noun, extra, supplement, appendage, add-on) |
| amplification(noun, increase, delay, development, spread) |
| appliance(noun, addition, decoration, fixture) |
| backer(noun, help, associate, subordinate, representative) |
| broadening(noun, increase, delay, development, spread) |
| confederate(help, associate, supporter, subordinate, representative) |