以下に LASM V2.0 のキーワードを示します。これらのキーワードはあらかじめ特別な意味を持っており、ラベル名やマクロ名として定義すると警告されます。特に理由のない場合は、キーワードの再定義は避けてください。
注意 V2.01 以降で追加されたキーワードは記載されていません。
| %OUT | .186 | .286 | .286P | .287 | .386 |
| .386P | .387 | .486 | .486P | .586 | .586P |
| .8086 | .8087 | .BREAK | .CODE | .CONST | .CONTINUE |
| .CREF | .DATA | .DATA? | .DOSSEG | .ELSE | .ELSEIF |
| .ENDIF | .ENDW | .ERR | .ERR1 | .ERR2 | .ERRB |
| .ERRDEF | .ERRDIF | .ERRDIFI | .ERRE | .ERRIDN | .ERRIDNI |
| .ERRNB | .ERRNDEF | .ERRNZ | .EXIT | .FARDATA | .FARDATA? |
| .IF | .LALL | .LFCOND | .LIST | .MODEL | .NO87 |
| .RADIX | .REPEAT | .SALL | .SEQ | .SFCOND | .STACK |
| .STARTUP | .TFCOND | .TYPE | .UNTIL | .UNTILCXZ | .WHILE |
| .XALL | .XCREF | .XLIST | @@ | @B | @CODESIZE |
| @CURSEG | @DATASIZE | @DATE | @F | @FILENAME | @TIME |
| AAA | AAD | AAM | AAS | ABS | ADC |
| ADD | AH | AL | ALIGN | AND | ARPL |
| ASSUME | AT | AX | BASIC | BH | BL |
| BOUND | BP | BSF | BSR | BSWAP | BT |
| BTC | BTR | BTS | BX | BYTE | C |
| CALL | CARRY? | CBW | CDQ | CH | CL |
| CLC | CLD | CLI | CLTS | CMC | CMP |
| CMPS | CMPSB | CMPSD | CMPSW | CMPXCHG | CMPXCHG8B |
| COMM | COMMENT | COMMON | COMPACT | CPUID | CR0 |
| CR1 | CR2 | CR3 | CR4 | CS | CWD |
| CWDE | CX | DAA | DAS | DB | DD |
| DEC | DF | DH | DI | DIV | DL |
| DOSSEG | DQ | DR0 | DR1 | DR2 | DR3 |
| DR4 | DR5 | DR6 | DR7 | DS | DT |
| DW | DWORD | DX | EAX | EBP | EBX |
| ECHO | ECX | EDI | EDX | ELSE | ELSEIF |
| ELSEIF1 | ELSEIF2 | ELSEIFB | ELSEIFDEF | ELSEIFDIF | ELSEIFE |
| ELSEIFIDN | ELSEIFNB | ELSEIFNDEF | END | ENDIF | ENDM |
| ENDP | ENDS | ENTER | EQ | EQU | ES |
| ESC | ESI | ESP | EVEN | EXITM | EXTERN |
| EXTERNDEF | EXTRN | F2XM1 | FABS | FADD | FADDP |
| FAR | FAR16 | FAR32 | FARSTACK | FBLD | FBSTP |
| FCHS | FCLEX | FCOM | FCOMP | FCOMPP | FCOS |
| FDECSTP | FDISI | FDIV | FDIVP | FDIVR | FDIVRP |
| FENI | FFREE | FIADD | FICOM | FICOMP | FIDIV |
| FIDIVR | FILD | FIMUL | FINCSTP | FINIT | FIST |
| FISTP | FISUB | FISUBR | FLAT | FLD | FLD1 |
| FLDCW | FLDENV | FLDENVD | FLDENVW | FLDL2E | FLDL2T |
| FLDLG2 | FLDLN2 | FLDPI | FLDZ | FMUL | FMULP |
| FNCLEX | FNDISI | FNENI | FNINIT | FNOP | FNSAVE |
| FNSAVED | FNSAVEW | FNSTCW | FNSTENV | FNSTENVD | FNSTENVW |
| FNSTSW | FOR | FORC | FORTRAN | FPATAN | FPREM |
| FPREM1 | FPTAN | FRNDINT | FRSTOR | FRSTORD | FRSTORW |
| FS | FSAVE | FSAVED | FSAVEW | FSCALE | FSIN |
| FSINCOS | FSQRT | FST | FSTCW | FSTENV | FSTENVD |
| FSTENVW | FSTP | FSTSW | FSUB | FSUBP | FSUBR |
| FSUBRP | FTST | FUCOM | FUCOMP | FUCOMPP | FWAIT |
| FWORD | FXAM | FXCH | FXTRACT | FYL2X | FYL2XP1 |
| GE | GROUP | GS | GT | HIGH | HIGHWORD |
| HLT | HUGE | IDIV | IF | IF1 | IF2 |
| IFB | IFDEF | IFDIF | IFDIFI | IFE | IFIDN |
| IFIDNI | IFNB | IFNDEF | IMUL | IN | INC |
| INCLIB | INCLUDE | INCLUDEBIN | INCLUDELIB | INS | INSB |
| INSD | INSW | INT | INTO | INVD | INVLPG |
| IRET | IRETD | IRETF | IRP | IRPC | JA |
| JAE | JB | JBE | JC | JCXZ | JE |
| JECXZ | JG | JGE | JL | JLE | JMP |
| JNA | JNAE | JNB | JNBE | JNC | JNE |
| JNG | JNGE | JNL | JNLE | JNO | JNP |
| JNS | JNZ | JO | JP | JPE | JPO |
| JS | JZ | LABEL | LAHF | LAR | LARGE |
| LDS | LE | LEA | LEAVE | LENGTH | LENGTHOF |
| LES | LFS | LGDT | LGS | LIDT | LLDT |
| LMSW | LOCAL | LOCK | LODS | LODSB | LODSD |
| LODSW | LOOP | LOOPD | LOOPE | LOOPED | LOOPEW |
| LOOPNE | LOOPNED | LOOPNEW | LOOPNZ | LOOPNZD | LOOPNZW |
| LOOPW | LOOPZ | LOOPZD | LOOPZW | LOW | LOWWORD |
| LSL | LSS | LT | LTR | MACRO | MASK |
| MEDIUM | MEMORY | MOD | MOV | MOVS | MOVSB |
| MOVSD | MOVSW | MOVSX | MOVZX | MUL | NAME |
| NE | NEAR | NEAR16 | NEAR32 | NEARSTACK | NEG |
| NOP | NOT | NOTHING | OFFSET | OPTION | OR |
| ORG | OS_DOS | OUT | OUTS | OUTSB | OUTSD |
| OUTSW | OVERFLOW? | PAGE | PARA | PARITY? | PASCAL |
| POP | POPA | POPAD | POPF | POPFD | PRIVATE |
| PROC | PROTO | PTR | PUBLIC | PURGE | PUSH |
| PUSHA | PUSHAD | PUSHD | PUSHF | PUSHFD | PUSHW |
| QWORD | RCL | RCR | RDMSR | RDTSC | rDUP |
| READONLY | REAL10 | REAL4 | REAL8 | RECORD | REP |
| REPE | REPEAT | REPNE | REPNZ | REPT | REPZ |
| RET | RETF | RETN | ROL | ROR | RSM |
| SAHF | SAL | SAR | SBB | SBYTE | SCAS |
| SCASB | SCASD | SCASW | SDWORD | SEG | SEGMENT |
| SETA | SETAE | SETB | SETBE | SETC | SETE |
| SETG | SETGE | SETL | SETLE | SETNA | SETNAE |
| SETNB | SETNBE | SETNC | SETNE | SETNG | SETNGE |
| SETNL | SETNLE | SETNO | SETNP | SETNS | SETNZ |
| SETO | SETP | SETPE | SETPO | SETS | SETZ |
| SGDT | SHL | SHLD | SHORT | SHR | SHRD |
| SI | SIDT | SIGN? | SIZE | SIZEOF | SLDT |
| SMALL | SMSW | SP | SS | STACK | STC |
| STD | STDCALL | STI | STOS | STOSB | STOSD |
| STOSW | STR | STRUC | STRUCT | SUB | SUBTITLE |
| SUBTTL | SWORD | SYSCALL | TBYTE | TEST | TEXTEQU |
| THIS | TINY | TITLE | TR6 | TR7 | TYPE |
| TYPEDEF | USE16 | USE32 | USES | VERR | VERW |
| WAIT | WBINVD | WIDTH | WORD | WRMSR | XADD |
| XCHG | XLAT | XLATB | XOR | ZERO? |