Word Forms of "knapsack" (5 forms)

Noun

Form	Word
Plural	knapsacks

Pluralknapsacks

Verb

Form	Word
Participle, Past	knapsacked
Participle, Present	knapsacking
Past	knapsacked
Present, Singular, Third-Person	knapsacks

Participle, Pastknapsacked

Participle, Presentknapsacking

Pastknapsacked

Present, Singular, Third-Personknapsacks

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.