Here's what rhymes with acknowledge.

Consider these alternatives

admit / which recognize / size concede / need acknowledges / colleges criticize / size agree / be deny / my ignore / more understand / hand say / they recognizing / rising regard / part disagree / be nonetheless / less nevertheless / less aware / where indeed / need contend / went believe / leave refusing / using neither / either apologize / size refusal / approval embrace / place loath / both nor / or explain / main refuse / whose blame / same emphasize / size insisting / existing recognise / peace refused / used reason / season