• easp fern,
• dasp fern,
• fasp fern,
• tasp fern,
• 5asp fern,
• 4asp fern,
• rzsp fern,
• rssp fern,
• rwsp fern,
• rqsp fern,
• raap fern,
• razp fern,
• raxp fern,
• radp fern,
• raep fern,
• rawp fern,
• raso fern,
• rasl fern,
• ras- fern,
• ras0 fern

The adjective form of the word "rasp fern" is "rasp-ferny".

The plural form of "rasp fern" is "rasp ferns".

The singular form of the word "rasp fern" is "rasp fern". This is because "rasp fern" is already in its singular form and doesn't change when referring to a single instance of the word.