Antonyms of adj tip-up

1 sense of tip-up

Sense 1
tip-up -- (constructed so as to tip up or out of the way; "the little tip-up seat of the taxi")

INDIRECT (VIA collapsible) -> noncollapsible, noncollapsable -- (not capable of collapsing)

Similarity of adj tip-up

1 sense of tip-up

Sense 1
tip-up -- (constructed so as to tip up or out of the way; "the little tip-up seat of the taxi")
       => collapsible (vs. noncollapsible), collapsable -- (capable of collapsing or being collapsed; "a collapsible boat")