What are the best answers for “(kno3) used especially as a fertilizer and explosive”?

niter, nitre, saltpeter, saltpetre.

How many letters does the top answer for “(kno3) used especially as a fertilizer and explosive” have?

The most common answer is niter (5 letters).

4 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

niter 5 letters wn-def

(KNO3) used especially as a fertilizer and explosive

nitre 5 letters wn-def

(KNO3) used especially as a fertilizer and explosive

saltpeter 9 letters wn-def

(KNO3) used especially as a fertilizer and explosive

saltpetre 9 letters wn-def

(KNO3) used especially as a fertilizer and explosive