A Certain Extent

Antonyms for a certain extent:

completely, totally, wholly.

Synonyms for a certain extent:

partially (adverb)

halfway, little by little, moderately, partly, piecemeal, somewhat, Fractionally, piece by piece, by degrees, by installments, in part, in some measure, to a certain extent, not wholly, to a certain degree.

partly (adverb)

at best, at least, at most, at worst, carelessly, inadequately, incompletely, insufficiently, measurably, notably, noticeably, partially, relatively, slightly, bit by bit, not entirely, in a general way, within limits, not fully, in bits and pieces, in some ways, not strictly speaking, so far as possible, up to a certain point.