| English | Spanish |
| hard agar | agar concentrado |
| hard bark | corteza dura |
| hard clam | almejón de sangre (Callista chione, Meretrix chione) |
| hard clam | mercenaria (Mercenaria mercenaria (Linnaeus), Venus mercenaria) |
| hard clam | almejón (Callista chione, Meretrix chione) |
| hard clam | almejón brillante (Callista chione, Meretrix chione) |
| hard clams | mercenarias duras (Meretrix) |
| hard fescue | canuela durilla (Festuca longifolia, Festuca ovina var duriuscula, Festuca trachyphylla) |
| hard fescue | festuca durilla (Festuca longifolia, Festuca ovina var duriuscula, Festuca trachyphylla) |
| hard fescue | barcea (Festuca longifolia, Festuca ovina var duriuscula, Festuca trachyphylla) |
| hard fibre | fibra dura |
| hard fibre plant | planta de fibra gruesa |
| hard fibre plant | planta de fibra dura |
| hard gill | laminillas degeneradas |
| hard shelled clam | mercenaria (Mercenaria mercenaria (Linnaeus), Venus mercenaria) |
| hard streak | madera de compresión |
| Japanese hard clam | mercenaria japonesa (Meretrix lusoria) |
