| affix(noun, verb, continue, boost, attach) |
| increment(noun, increase, gain, rise, extra) |
| annex(noun, verb, part, advance, increase) |
| sequel(noun, increase, line, extra, addition) |
| supplementation |
| accompaniment(noun, part, rest, match, balance) |
| enrich(verb, improve, enhance, add, augment) |
| postscript(noun, increase, line, extra, addition) |
| subsidiary(noun, increase, extra, addition, extension) |
| augmentation(noun, increase, delay, rise, influence) |
| codicil(noun, act, part, increase, measure) |
| expand(verb, take, cover, advance, increase) |
| extra(noun, part, increase, addition, extension) |
| reinforce(verb, support, help, advance, increase) |
| accession(noun, increase, raise, rise, extra) |
| add-on(noun, increase, extra, addition, attachment) |
| add on(verb, expression, phrasal verb) |
| attachment(noun, act, increase, measure, extra) |
| auxiliary(noun, adjective, part, extra, addition) |
| boost(verb, support, take, cover, advance) |