| tack(noun, verb, connection, attach, needle) |
| main(adjective, lead, head, master, basic) |
| primary(adjective, lead, head, master, basic) |
| hook(noun, connection, attach, needle, fastener) |
| stock(noun, adjective, substance, material, matter) |
| nail(noun, verb, connection, needle, fastener) |
| pin(noun, verb, bar, connection, fasten) |
| principal(adjective, lead, head, master, basic) |
| chief(adjective, lead, head, master, basic) |
| basic(noun, adjective, set, usual, regular) |
| connect(verb, attach) |
| substance(noun, entity, organization, area, body) |
| standard(adjective, usual, regular, routine, normal) |
| core(noun, adjective, organization, area, strength) |
| essential(adjective, basic, necessary) |
| merchandise(noun, goods, merchandise) |
| stuff(noun, strength, substance, material, effect) |
| affix(verb, attach) |
| raw material(noun, expression, idiom, resources, materials) |
| bolt(noun, verb, part, connection, fastener) |