Opposite is an absolute. There cannot be something which is more or most opposite.
comparative - merrier superlative - merriest
Frequency is a noun and doesn't have a comparative or superlative form.Frequent is an adjective and the comparative form is more frequent and the superlative form is most frequent
comparative=tenser superlative =tensest
The comparative form of tight is "tighter". The superlative form is "tightest".
The comparative form of tinny is tinnier, and the superlative form is tinniest.
'Opposite' has no comparative or superlative form. Something is either opposite something else (or opposite to something else), or it is not.
more opposite, most opposite
comparative - merrier superlative - merriest
Bitter is a comparative and a bittest is superlative
Sweetie is a noun and does not have a comparative or superlative form.
more opposite, most opposite
The comparative form of gloomy is gloomier, the superlative form is gloomiest.
The comparative form of cloudy is "cloudier". The superlative form is "cloudiest".
"Easier" is the comparative form of easy. The superlative form is easiest.
"Larger" is the comparative form of large. The superlative form is largest.
The comparative form of easy is easier, and the superlative form is easiest.
"Older" is the comparative form of old. The superlative form is oldest.