Strong’s Hebrew Lexicon:

Shabbat: שַׁבָּת shabbâth, shab-bawth’; intensive from H7673; intermission, i.e (specifically) the Sabbath:—(+ every) sabbath.

Shalom: שָׁלוֹם shâlôwm, shaw-lome’; or שָׁלֹם shâlôm; from H7999; safe, i.e. (figuratively) well, happy, friendly; also (abstractly) welfare, i.e. health, prosperity, peace:—× do, familiar, × fare, favour, friend, × great, (good) health, (× perfect, such as be at) peace(-able, -ably), prosper(-ity, -ous), rest, safe(-ty), salute, welfare, (× all is, be) well, × wholly.