Words ranked number 81 to 90 in the list of the most common Hindi words (courtesy of Hindi Google Group and Resource Center for Indian Language Technology Solutions):
81. दूसरे dū-sa-re (adverb) another; secondly
82. हाथ hāth (m. noun) hand (as in giving a hand)
83. भाषा bhā-ṣā (f. noun) language; speech
84. मेरे me-re (pl. adjective) my
85. मैंने maiṃ-ne (pronoun) I - This is the first person singular ergative case of मैं. ने denotes ergative case.
86. तुम tum (pronoun) you (informal)
87. बीच bīc (m. noun) middle. बीच के is the preposition between.
88. वाली vā-lī (f. suffix) 1. (added to noun) a person employed in the preceding noun. 2. (added to adjective) adds emphasis to preceding adjective. 3. (added to noun, adjective, or noun phrase) gives adjectival properties to preceding word. 4. (added to verb) gives agentive meaning to preceding verb. Feminine form of वाला. http://www.geekofalltrades.net/2007/02/grammarwallah.html has a good explanation of how the word works.
89. बड़े ba-ɽe (pl. m. adjective) big, large; great; elder
90. प्रति pra-ti 1. (f. noun) copy of an original. 2. (f. noun) section, group (of a larger whole). 3. (prefix) again, back again, re-. 4. (preposition) towards, against, anti-. 5. (preposition) each, every; per. 6. (preposition) similar to.
Pradeep also says that रति is used on the cover of letters in place of to.
81 - can also mean "another" and is most commonly used in that sense.
82 - can also be used as in giving a hand in some work. I've never heard it used as hand unless they want to beat you or want you to show what's in your hand.
87 - beach may be a better pronounciation for it. They sound the same actually.
89 - can also be used to mean elder.
90 - mostly used in letters. It's used in place of "To" on the envelope.