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alongside

1 alongside ˈlɑːŋˈsaɪd/ adverb
1 alongside
ˈlɑːŋˈsaɪd/
adverb
Britannica Dictionary definition of ALONGSIDE
: along or close at the side

alongside of

chiefly US, informal
: next to or together with (someone or something) : alongside
2 alongside ˈlɑːŋˈsaɪd/ preposition
2 alongside
ˈlɑːŋˈsaɪd/
preposition
Britannica Dictionary definition of ALONGSIDE
: next to (someone or something)
: along the side of (something)
: at the same time as (something) : together with (something)