| rudiments(noun, touch, element, bit, little) |
| fundamentals(noun, substance, heart, soul, focus) |
| essentials(noun, support, information, heart, bread) |
| basis(noun, substance, element, grounds) |
| heart(noun, support, stay, substance, authority) |
| bedrock(noun, substance, basis, grounds) |
| elements(noun, touch, bit, little, essentials) |
| fundamental principle(noun, expression, idiom) |
| principles(noun, practice, discipline, heart, foundation) |
| alphabet |
| basic principle(noun, expression, idiom) |
| core(noun, substance, heart, soul, details) |
| element |
| essence(noun, substance, heart, soul, details) |
| foundations(noun, practicalities) |
| grammar(worthiness, ethos, ideals) |
| meat(noun, substance, heart, soul, focus) |
| nitty-gritty(noun, support, information, stay, substance) |
| principle(noun, element) |
| staple |