Antonyms of adj momentaneous

1 sense of momentaneous

Sense 1
fleeting, fugitive, momentaneous, momentary -- (lasting for a markedly brief time; "a fleeting glance"; "fugitive hours"; "rapid momentaneous association of things that meet and pass"; "a momentary glimpse")

INDIRECT (VIA short) -> long -- (primarily temporal sense; being or indicating a relatively great or greater than average duration or passage of time or a duration as specified; "a long life"; "a long boring speech"; "a long time"; "a long friendship"; "a long game"; "long ago"; "an hour long")

Similarity of adj momentaneous

1 sense of momentaneous

Sense 1
fleeting, fugitive, momentaneous, momentary -- (lasting for a markedly brief time; "a fleeting glance"; "fugitive hours"; "rapid momentaneous association of things that meet and pass"; "a momentary glimpse")
       => short (vs. long) -- (primarily temporal sense; indicating or being or seeming to be limited in duration; "a short life"; "a short flight"; "a short holiday"; "a short story"; "only a few short months")