is that twoish is (colloquial) any time close to two o'clock while twoosh is a tweet which precisely meets the 140-character limit set by microblogging service (twitter).

is that two is the digit/figure 2 while twoish is (colloquial) any time close to two o'clock.

As a numeral two

is (label) a numerical value equal to ; the second number in the set of natural numbers (especially in number theory); the cardinality of the set {0, 1}; one plus one ordinal: second this many dots (••).