"allies" in the noun sense
1. ally
a friendly nation
2. ally, friend
an associate who provides cooperation or assistance
"he's a good ally in fight"
3. allies
an alliance of nations joining together to fight a common enemy
"allies" in the verb sense
1. ally
become an ally or associate, as by a treaty or marriage
"He allied himself with the Communists"
Source: WordNet® (An amazing lexical database of English)
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